Use alpha rather than inset rect for FakeRasterSource::CreateFilled.

cc/test/fake_raster_source.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/test/fake_raster_source.h"
 
 #include <limits>
 
 #include "base/synchronization/waitable_event.h"
 #include "cc/test/fake_recording_source.h"
@@ skipping 10 matching lines @@
 
 scoped_refptr<FakeRasterSource> FakeRasterSource::CreateFilled(
     const gfx::Size& size) {
   auto recording_source =
       FakeRecordingSource::CreateFilledRecordingSource(size);
 
   SkPaint red_paint;
   red_paint.setColor(SK_ColorRED);
   recording_source->add_draw_rect_with_paint(gfx::Rect(size), red_paint);
 
-  gfx::Size smaller_size(size.width() - 10, size.height() - 10);
-  SkPaint green_paint;
-  green_paint.setColor(SK_ColorGREEN);
-  recording_source->add_draw_rect_with_paint(gfx::Rect(smaller_size),
-                                             green_paint);
+  SkPaint salmon_pink_paint;
+  salmon_pink_paint.setColor(SK_ColorRED);
+  salmon_pink_paint.setAlpha(128);
+  recording_source->add_draw_rect_with_paint(gfx::Rect(size),
+                                             salmon_pink_paint);
 
   recording_source->Rerecord();
 
   return make_scoped_refptr(
       new FakeRasterSource(recording_source.get(), false));
 }
 
 scoped_refptr<FakeRasterSource> FakeRasterSource::CreateFilledLCD(
     const gfx::Size& size) {
   auto recording_source =
@@ skipping 99 matching lines @@
     float contents_scale,
     const PlaybackSettings& settings) const {
   if (playback_allowed_event_)
     playback_allowed_event_->Wait();
   RasterSource::PlaybackToCanvas(canvas, canvas_bitmap_rect,
                                  canvas_playback_rect, contents_scale,
                                  settings);
 }
 
 }  // namespace cc