Fix the ignore identifiers (#6876)

I used the wrong identifiers here.

packages/flutter/lib/src/gestures/drag.dart

@@ -182,7 +182,7 @@ abstract class DragGestureRecognizer extends OneSequenceGestureRecognizer {
       _initialPosition = event.position;
       _pendingDragOffset = Offset.zero;
       if (onDown != null)
-        invokeCallback/*<Null>*/('onDown', () => onDown(new DragDownDetails(globalPosition: _initialPosition))); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+        invokeCallback/*<Null>*/('onDown', () => onDown(new DragDownDetails(globalPosition: _initialPosition))); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
     }
   }
 
@@ -196,7 +196,7 @@ abstract class DragGestureRecognizer extends OneSequenceGestureRecognizer {
       Offset delta = event.delta;
       if (_state == _DragState.accepted) {
         if (onUpdate != null) {
-          invokeCallback/*<Null>*/('onUpdate', () => onUpdate(new DragUpdateDetails( // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+          invokeCallback/*<Null>*/('onUpdate', () => onUpdate(new DragUpdateDetails( // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
             delta: _getDeltaForDetails(delta),
             primaryDelta: _getPrimaryDeltaForDetails(delta),
             globalPosition: event.position
@@ -218,9 +218,9 @@ abstract class DragGestureRecognizer extends OneSequenceGestureRecognizer {
       Offset delta = _pendingDragOffset;
       _pendingDragOffset = Offset.zero;
       if (onStart != null)
-        invokeCallback/*<Null>*/('onStart', () => onStart(new DragStartDetails(globalPosition: _initialPosition))); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+        invokeCallback/*<Null>*/('onStart', () => onStart(new DragStartDetails(globalPosition: _initialPosition))); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
       if (delta != Offset.zero && onUpdate != null) {
-        invokeCallback/*<Null>*/('onUpdate', () => onUpdate(new DragUpdateDetails( // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+        invokeCallback/*<Null>*/('onUpdate', () => onUpdate(new DragUpdateDetails( // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
           delta: _getDeltaForDetails(delta),
           primaryDelta: _getPrimaryDeltaForDetails(delta)
         )));
@@ -239,7 +239,7 @@ abstract class DragGestureRecognizer extends OneSequenceGestureRecognizer {
       resolve(GestureDisposition.rejected);
       _state = _DragState.ready;
       if (onCancel != null)
-        invokeCallback/*<Null>*/('onCancel', onCancel); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+        invokeCallback/*<Null>*/('onCancel', onCancel); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
       return;
     }
     bool wasAccepted = (_state == _DragState.accepted);
@@ -253,9 +253,9 @@ abstract class DragGestureRecognizer extends OneSequenceGestureRecognizer {
         final Offset pixelsPerSecond = velocity.pixelsPerSecond;
         if (pixelsPerSecond.distanceSquared > kMaxFlingVelocity * kMaxFlingVelocity)
           velocity = new Velocity(pixelsPerSecond: (pixelsPerSecond / pixelsPerSecond.distance) * kMaxFlingVelocity);
-        invokeCallback/*<Null>*/('onEnd', () => onEnd(new DragEndDetails(velocity: velocity))); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+        invokeCallback/*<Null>*/('onEnd', () => onEnd(new DragEndDetails(velocity: velocity))); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
       } else {
-        invokeCallback/*<Null>*/('onEnd', () => onEnd(new DragEndDetails(velocity: Velocity.zero))); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+        invokeCallback/*<Null>*/('onEnd', () => onEnd(new DragEndDetails(velocity: Velocity.zero))); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
       }
     }
     _velocityTrackers.clear();

packages/flutter/lib/src/gestures/long_press.dart

@@ -26,7 +26,7 @@ class LongPressGestureRecognizer extends PrimaryPointerGestureRecognizer {
   void didExceedDeadline() {
     resolve(GestureDisposition.accepted);
     if (onLongPress != null)
-      invokeCallback/*<Null>*/('onLongPress', onLongPress); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+      invokeCallback/*<Null>*/('onLongPress', onLongPress); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
   }
 
   @override

packages/flutter/lib/src/gestures/multitap.dart

@@ -191,7 +191,7 @@ class DoubleTapGestureRecognizer extends GestureRecognizer {
     _freezeTracker(tracker);
     _trackers.remove(tracker.pointer);
     if (onDoubleTap != null)
-      invokeCallback/*<Null>*/('onDoubleTap', onDoubleTap); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+      invokeCallback/*<Null>*/('onDoubleTap', onDoubleTap); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
     _reset();
   }
 
@@ -359,7 +359,7 @@ class MultiTapGestureRecognizer extends GestureRecognizer {
       longTapDelay: longTapDelay
     );
     if (onTapDown != null)
-      invokeCallback/*<Null>*/('onTapDown', () => onTapDown(event.pointer, new TapDownDetails(globalPosition: event.position))); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+      invokeCallback/*<Null>*/('onTapDown', () => onTapDown(event.pointer, new TapDownDetails(globalPosition: event.position))); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
   }
 
   @override
@@ -380,19 +380,19 @@ class MultiTapGestureRecognizer extends GestureRecognizer {
     _gestureMap.remove(pointer);
     if (resolution == _TapResolution.tap) {
       if (onTapUp != null)
-        invokeCallback/*<Null>*/('onTapUp', () => onTapUp(pointer, new TapUpDetails(globalPosition: globalPosition))); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+        invokeCallback/*<Null>*/('onTapUp', () => onTapUp(pointer, new TapUpDetails(globalPosition: globalPosition))); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
       if (onTap != null)
-        invokeCallback/*<Null>*/('onTap', () => onTap(pointer)); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+        invokeCallback/*<Null>*/('onTap', () => onTap(pointer)); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
     } else {
       if (onTapCancel != null)
-        invokeCallback/*<Null>*/('onTapCancel', () => onTapCancel(pointer)); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+        invokeCallback/*<Null>*/('onTapCancel', () => onTapCancel(pointer)); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
     }
   }
 
   void _handleLongTap(int pointer, Point lastPosition) {
     assert(_gestureMap.containsKey(pointer));
     if (onLongTapDown != null)
-      invokeCallback/*<Null>*/('onLongTapDown', () => onLongTapDown(pointer, new TapDownDetails(globalPosition: lastPosition))); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+      invokeCallback/*<Null>*/('onLongTapDown', () => onLongTapDown(pointer, new TapDownDetails(globalPosition: lastPosition))); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
   }
 
   @override

packages/flutter/lib/src/gestures/scale.dart

@@ -180,9 +180,9 @@ class ScaleGestureRecognizer extends OneSequenceGestureRecognizer {
             final Offset pixelsPerSecond = velocity.pixelsPerSecond;
             if (pixelsPerSecond.distanceSquared > kMaxFlingVelocity * kMaxFlingVelocity)
               velocity = new Velocity(pixelsPerSecond: (pixelsPerSecond / pixelsPerSecond.distance) * kMaxFlingVelocity);
-            invokeCallback/*<Null>*/('onEnd', () => onEnd(new ScaleEndDetails(velocity: velocity))); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+            invokeCallback/*<Null>*/('onEnd', () => onEnd(new ScaleEndDetails(velocity: velocity))); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
           } else {
-            invokeCallback/*<Null>*/('onEnd', () => onEnd(new ScaleEndDetails(velocity: Velocity.zero))); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+            invokeCallback/*<Null>*/('onEnd', () => onEnd(new ScaleEndDetails(velocity: Velocity.zero))); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
           }
         }
         _state = ScaleState.accepted;
@@ -200,11 +200,11 @@ class ScaleGestureRecognizer extends OneSequenceGestureRecognizer {
     if (_state == ScaleState.accepted && !configChanged) {
       _state = ScaleState.started;
       if (onStart != null)
-        invokeCallback/*<Null>*/('onStart', () => onStart(new ScaleStartDetails(focalPoint: focalPoint))); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+        invokeCallback/*<Null>*/('onStart', () => onStart(new ScaleStartDetails(focalPoint: focalPoint))); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
     }
 
     if (_state == ScaleState.started && onUpdate != null)
-      invokeCallback/*<Null>*/('onUpdate', () => onUpdate(new ScaleUpdateDetails(scale: _scaleFactor, focalPoint: focalPoint))); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+      invokeCallback/*<Null>*/('onUpdate', () => onUpdate(new ScaleUpdateDetails(scale: _scaleFactor, focalPoint: focalPoint))); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
   }
 
   @override

packages/flutter/lib/src/gestures/tap.dart

@@ -99,7 +99,7 @@ class TapGestureRecognizer extends PrimaryPointerGestureRecognizer {
   void resolve(GestureDisposition disposition) {
     if (_wonArenaForPrimaryPointer && disposition == GestureDisposition.rejected) {
       if (onTapCancel != null)
-        invokeCallback/*<Null>*/('onTapCancel', onTapCancel); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+        invokeCallback/*<Null>*/('onTapCancel', onTapCancel); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
       _reset();
     }
     super.resolve(disposition);
@@ -126,7 +126,7 @@ class TapGestureRecognizer extends PrimaryPointerGestureRecognizer {
     if (pointer == primaryPointer) {
       assert(state == GestureRecognizerState.defunct);
       if (onTapCancel != null)
-        invokeCallback/*<Null>*/('onTapCancel', onTapCancel); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+        invokeCallback/*<Null>*/('onTapCancel', onTapCancel); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
       _reset();
     }
   }
@@ -134,7 +134,7 @@ class TapGestureRecognizer extends PrimaryPointerGestureRecognizer {
   void _checkDown() {
     if (!_sentTapDown) {
       if (onTapDown != null)
-        invokeCallback/*<Null>*/('onTapDown', () => onTapDown(new TapDownDetails(globalPosition: initialPosition))); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+        invokeCallback/*<Null>*/('onTapDown', () => onTapDown(new TapDownDetails(globalPosition: initialPosition))); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
       _sentTapDown = true;
     }
   }
@@ -143,9 +143,9 @@ class TapGestureRecognizer extends PrimaryPointerGestureRecognizer {
     if (_wonArenaForPrimaryPointer && _finalPosition != null) {
       resolve(GestureDisposition.accepted);
       if (onTapUp != null)
-        invokeCallback/*<Null>*/('onTapUp', () => onTapUp(new TapUpDetails(globalPosition: _finalPosition))); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+        invokeCallback/*<Null>*/('onTapUp', () => onTapUp(new TapUpDetails(globalPosition: _finalPosition))); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
       if (onTap != null)
-        invokeCallback/*<Null>*/('onTap', onTap); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
+        invokeCallback/*<Null>*/('onTap', onTap); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27504
       _reset();
     }
   }

packages/flutter_test/lib/src/controller.dart

@@ -134,7 +134,7 @@ class WidgetController {
     TestAsyncUtils.guardSync();
     return allElements
            .where((Element element) => element is StatefulElement)
-           .map((StatefulElement element) => element.state); // ignore: INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27827
+           .map((StatefulElement element) => element.state); // ignore: STRONG_MODE_INVALID_CAST_FUNCTION_EXPR, https://github.com/dart-lang/sdk/issues/27827
   }
 
   /// The matching state in the widget tree.