Remove redundant Paint.setARGB in favor of assigning to Paint.color.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1182563002.

examples/game/lib/sprite.dart

@@ -53,7 +53,7 @@ class Sprite extends NodeWithSize {
 
       // Setup paint object for opacity and transfer mode
       Paint paint = new Paint();
-      paint.setARGB((255.0*_opacity).toInt(), 255, 255, 255);
+      paint.color = Color.fromARGB((255.0*_opacity).toInt(), 255, 255, 255);
       if (colorOverlay != null) {
         paint.setColorFilter(new ColorFilter.mode(colorOverlay, TransferMode.srcATopMode));
       }
@@ -66,7 +66,7 @@ class Sprite extends NodeWithSize {
     else {
       // Paint a red square for missing texture
       canvas.drawRect(new Rect.fromLTRB(0.0, 0.0, size.width, size.height),
-          new Paint()..setARGB(255, 255, 0, 0));
+          new Paint()..color = Color.fromARGB(255, 255, 0, 0));
     }
     canvas.restore();
   }

examples/raw/circle.sky

@@ -14,7 +14,7 @@ void main() {
   var element = document.getElementById('canvas');
   element.requestPaint((PaintingContext context) {
     Paint paint = new Paint();
-    paint.setARGB(128, 0, 255, 0);
+    paint.color = Color.fromARGB(128, 0, 255, 0);
     double radius = math.min(context.width, context.height) / 2.0;
     context.drawCircle(context.width / 2.0, context.height / 2.0, radius, paint);
     context.commit();

examples/raw/custom_paint_without_element.sky

@@ -9,7 +9,7 @@ void main() {
   PictureRecorder recorder = new PictureRecorder(width, height);
   double radius = min(width, height) * 0.45;
 
-  Paint paint = new Paint()..setARGB(255, 0, 255, 0);
+  Paint paint = new Paint()..color = Color.fromARGB(255, 0, 255, 0);
 
   recorder.drawCircle(width / 2, height / 2, radius, paint);
 

examples/raw/draw_picture_into_canvas.sky

@@ -15,7 +15,7 @@ void main() {
   Picture stamp = stampRecorder.endRecording();
 
   PictureRecorder recorder = new PictureRecorder(width, height);
-  Paint paint = new Paint()..setARGB(255, 0, 255, 0);
+  Paint paint = new Paint()..color = Color.fromARGB(255, 0, 255, 0);
   recorder.drawCircle(50.0, 50.0, 50.0, paint);
   recorder.translate(10.0, 10.0);
   recorder.drawPicture(stamp);

examples/raw/hello_world.dart

@@ -12,7 +12,7 @@ Picture draw(int a, int r, int g, int b) {
   PictureRecorder recorder = new PictureRecorder(width, height);
   double radius = min(width, height) * 0.45;
 
-  Paint paint = new Paint()..setARGB(a, r, g, b);
+  Paint paint = new Paint()..color = Color.fromARGB(a, r, g, b);
   recorder.drawCircle(width / 2, height / 2, radius, paint);
   return recorder.endRecording();
 }

examples/raw/paint_element_into_displaylist.sky

@@ -11,7 +11,7 @@ void main() {
   double width = window.innerWidth.toDouble();
   double height = window.innerHeight.toDouble();
   PictureRecorder recorder = new PictureRecorder(width, height);
-  Paint paint = new Paint()..setARGB(255, 0, 255, 0);
+  Paint paint = new Paint()..color = Color.fromARGB(255, 0, 255, 0);
   recorder.drawCircle(50.0, 50.0, 50.0, paint);
   recorder.translate(10.0, 10.0);
   root.paint(recorder);

examples/raw/spinning_arabic.dart

@@ -16,7 +16,7 @@ void beginFrame(double timeStamp) {
   canvas.translate(view.width / 2.0, view.height / 2.0);
   canvas.rotate(math.PI * delta / 1800);
   canvas.drawRect(new Rect.fromLTRB(-100.0, -100.0, 100.0, 100.0),
-                  new Paint()..setARGB(255, 0, 255, 0));
+                  new Paint()..color = Color.fromARGB(255, 0, 255, 0));
 
   double sin = math.sin(delta / 200);
   layoutRoot.maxWidth = 150.0 + (50 * sin);

examples/raw/spinning_image.dart

@@ -19,7 +19,7 @@ void beginFrame(double timeStamp) {
   canvas.translate(view.width / 2.0, view.height / 2.0);
   canvas.rotate(math.PI * delta / 1800);
   canvas.scale(0.2, 0.2);
-  Paint paint = new Paint()..setARGB(255, 0, 255, 0);
+  Paint paint = new Paint()..color = Color.fromARGB(255, 0, 255, 0);
   if (image != null)
     canvas.drawImage(image, -image.width / 2.0, -image.height / 2.0, paint);
   view.picture = canvas.endRecording();

examples/raw/spinning_square.dart

@@ -16,7 +16,7 @@ void beginFrame(double timeStamp) {
   canvas.translate(view.width / 2.0, view.height / 2.0);
   canvas.rotate(math.PI * delta / 1800);
   canvas.drawRect(new Rect.fromLTRB(-100.0, -100.0, 100.0, 100.0),
-                  new Paint()..setARGB(255, 0, 255, 0));
+                  new Paint()..color = Color.fromARGB(255, 0, 255, 0));
   view.picture = canvas.endRecording();
   view.scheduleFrame();
   tracing.end('beginFrame');