Add display list fallback reason histograms for 2D canvas

third_party/WebKit/Source/core/frame/ImageBitmap.h

 // Copyright 2013 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.
 
 #ifndef ImageBitmap_h
 #define ImageBitmap_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/CoreExport.h"
 #include "core/html/HTMLImageElement.h"
@@ skipping 30 matching lines @@
     unsigned long height() const;
     IntSize size() const;
 
     bool isNeutered() const { return m_isNeutered; }
     bool originClean() const { return m_image->originClean(); }
     PassRefPtr<StaticBitmapImage> transfer();
 
     ~ImageBitmap() override;
 
     // CanvasImageSource implementation
-    PassRefPtr<Image> getSourceImageForCanvas(SourceImageStatus*, AccelerationHint) const override;
+    PassRefPtr<Image> getSourceImageForCanvas(SourceImageStatus*, AccelerationHint, SnapshotReason) const override;
     bool wouldTaintOrigin(SecurityOrigin*) const override { return !m_image->originClean(); }
     void adjustDrawRects(FloatRect* srcRect, FloatRect* dstRect) const override;
     FloatSize elementSize() const override;
 
     // ImageBitmapSource implementation
     IntSize bitmapSourceSize() const override { return size(); }
     ScriptPromise createImageBitmap(ScriptState*, EventTarget&, int sx, int sy, int sw, int sh, ExceptionState&) override;
 
     DECLARE_VIRTUAL_TRACE();
 
@@ skipping 10 matching lines @@
     void notifyImageSourceChanged() override;
     bool requestsHighLiveResourceCachePriority() override { return true; }
 
     RefPtr<StaticBitmapImage> m_image;
     bool m_isNeutered = false;
 };
 
 } // namespace blink
 
 #endif // ImageBitmap_h