Support canvas size as default object size

third_party/WebKit/Source/core/html/canvas/CanvasImageSource.h

Index: third_party/WebKit/Source/core/html/canvas/CanvasImageSource.h
diff --git a/third_party/WebKit/Source/core/html/canvas/CanvasImageSource.h b/third_party/WebKit/Source/core/html/canvas/CanvasImageSource.h
index b1a87884e55bdec926592d7697a50991e92c60b7..7e897c43ec9b1d258d860fd6e06e7cc8613b7e5f 100644
--- a/third_party/WebKit/Source/core/html/canvas/CanvasImageSource.h
+++ b/third_party/WebKit/Source/core/html/canvas/CanvasImageSource.h
@@ -46,7 +46,7 @@ enum SourceImageStatus {
 
 class CORE_EXPORT CanvasImageSource {
 public:
-    virtual PassRefPtr<Image> getSourceImageForCanvas(SourceImageStatus*, AccelerationHint, SnapshotReason) const = 0;
+    virtual PassRefPtr<Image> getSourceImageForCanvas(SourceImageStatus*, AccelerationHint, SnapshotReason, const FloatSize&) const = 0;
 
     // IMPORTANT: Result must be independent of whether destinationContext is
     // already tainted because this function may be used to determine whether
@@ -62,8 +62,8 @@ public:
     // source image is a subregion of the image returned by getSourceImageForCanvas.
     virtual void adjustDrawRects(FloatRect* srcRect, FloatRect* dstRect) const { }
 
-    virtual FloatSize elementSize() const = 0;
-    virtual FloatSize defaultDestinationSize() const { return elementSize(); }
+    virtual FloatSize elementSize(const FloatSize& defaultObjectSize) const = 0;
+    virtual FloatSize defaultDestinationSize(const FloatSize& defaultObjectSize) const { return elementSize(defaultObjectSize); }
     virtual const KURL& sourceURL() const { return blankURL(); }
     virtual bool isOpaque() const { return false; }