fix a typo in trace events for the image cache (#57821)

dev/tracing_tests/test/image_cache_tracing_test.dart

@@ -5,6 +5,8 @@
 import 'dart:convert';
 import 'dart:developer' as developer;
 import 'dart:isolate' as isolate;
+import 'dart:typed_data';
+import 'dart:ui' as ui;
 
 import 'package:flutter/painting.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -31,12 +33,21 @@ void main() {
 
   test('Image cache tracing', () async {
     final TestImageStreamCompleter completer1 = TestImageStreamCompleter();
+    final TestImageStreamCompleter completer2 = TestImageStreamCompleter();
     PaintingBinding.instance.imageCache.putIfAbsent(
       'Test',
       () => completer1,
     );
     PaintingBinding.instance.imageCache.clear();
 
+    // ignore: invalid_use_of_protected_member
+    completer2.setImage(const ImageInfo(image: TestImage()));
+    PaintingBinding.instance.imageCache.putIfAbsent(
+      'Test2',
+      () => completer2,
+    );
+    PaintingBinding.instance.imageCache.evict('Test2');
+
     final Timeline timeline = await vmService.getVMTimeline();
     _expectTimelineEvents(
       timeline.traceEvents,
@@ -59,6 +70,14 @@ void main() {
             'isolateId': isolateId,
           }
         },
+        <String, dynamic>{
+          'name': 'ImageCache.putIfAbsent',
+          'args': <String, dynamic>{'key': 'Test2', 'isolateId': isolateId}
+        },
+        <String, dynamic>{
+          'name': 'ImageCache.evict',
+          'args': <String, dynamic>{'sizeInBytes': 0, 'isolateId': isolateId}
+        },
       ],
     );
   }, skip: isBrowser); // uses dart:isolate and io
@@ -92,3 +111,19 @@ bool _mapsEqual(Map<String, dynamic> expectedArgs, Map<String, dynamic> args) {
 }
 
 class TestImageStreamCompleter extends ImageStreamCompleter {}
+
+class TestImage implements ui.Image {
+  const TestImage({this.height = 0, this.width = 0});
+  @override
+  final int height;
+  @override
+  final int width;
+
+  @override
+  void dispose() { }
+
+  @override
+  Future<ByteData> toByteData({ ui.ImageByteFormat format = ui.ImageByteFormat.rawRgba }) {
+    throw UnimplementedError();
+  }
+}

packages/flutter/lib/src/painting/image_cache.dart

@@ -31,7 +31,7 @@ const int _kDefaultSizeBytes = 100 << 20; // 100 MiB
 ///
 /// A caller can determine whether an image is already in the cache by using
 /// [containsKey], which will return true if the image is tracked by the cache
-/// in a pending or compelted state. More fine grained information is available
+/// in a pending or completed state. More fine grained information is available
 /// by using the [statusForKey] method.
 ///
 /// Generally this class is not used directly. The [ImageProvider] class and its
@@ -255,7 +255,7 @@ class ImageCache {
       if (!kReleaseMode) {
         Timeline.instantSync('ImageCache.evict', arguments: <String, dynamic>{
           'type': 'keepAlive',
-          'sizeiInBytes': image.sizeBytes,
+          'sizeInBytes': image.sizeBytes,
         });
       }
       _currentSizeBytes -= image.sizeBytes;