Refactor ImageBuffer to make OffscreenCanvas match HTMLCanvasElement

third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DUsageTrackingTest.cpp

 // Copyright 2016 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 "modules/canvas2d/CanvasRenderingContext2D.h"
 
 #include "bindings/core/v8/V8BindingForCore.h"
 #include "core/dom/Document.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
@@ skipping 23 matching lines @@
 
 enum BitmapOpacity { kOpaqueBitmap, kTransparentBitmap };
 
 class FakeImageSource : public CanvasImageSource {
  public:
   FakeImageSource(IntSize, BitmapOpacity);
 
   PassRefPtr<Image> GetSourceImageForCanvas(SourceImageStatus*,
                                             AccelerationHint,
                                             SnapshotReason,
-                                            const FloatSize&) const override;
+                                            const FloatSize&) override;
 
   bool WouldTaintOrigin(
       SecurityOrigin* destination_security_origin) const override {
     return false;
   }
   FloatSize ElementSize(const FloatSize&) const override {
     return FloatSize(size_);
   }
   bool IsOpaque() const override { return is_opaque_; }
   bool IsAccelerated() const override { return false; }
@@ skipping 14 matching lines @@
       SkSurface::MakeRasterN32Premul(size_.Width(), size_.Height()));
   surface->getCanvas()->clear(opacity == kOpaqueBitmap ? SK_ColorWHITE
                                                        : SK_ColorTRANSPARENT);
   image_ = StaticBitmapImage::Create(surface->makeImageSnapshot());
 }
 
 PassRefPtr<Image> FakeImageSource::GetSourceImageForCanvas(
     SourceImageStatus* status,
     AccelerationHint,
     SnapshotReason,
-    const FloatSize&) const {
+    const FloatSize&) {
   if (status)
     *status = kNormalSourceImageStatus;
   return image_;
 }
 
 class CanvasRenderingContextUsageTrackingTest : public ::testing::Test {
  protected:
   CanvasRenderingContextUsageTrackingTest();
   void SetUp() override;
 
@@ skipping 586 matching lines @@
   for (int i = 0; i < kNumReps; i++) {
     Context2d()->fillRect(10, 10, 100, 100);
   }
   EXPECT_EQ(kNumReps, Context2d()
                           ->GetUsage()
                           .num_draw_calls[BaseRenderingContext2D::kFillRect]);
 }
 
 }  // namespace UsageTrackingTests
 }  // namespace blink