[HTMLCanvasElement.toBlob] Default callback version without scheduler

Source/core/html/HTMLCanvasElement.h

Index: Source/core/html/HTMLCanvasElement.h
diff --git a/Source/core/html/HTMLCanvasElement.h b/Source/core/html/HTMLCanvasElement.h
index 29dad69ba21f9cc0379eaa21318fc9c1216b0522..55f2bbdad5427adb70f32c1da813dd67adba56af 100644
--- a/Source/core/html/HTMLCanvasElement.h
+++ b/Source/core/html/HTMLCanvasElement.h
@@ -35,6 +35,7 @@
 #include "core/dom/DocumentVisibilityObserver.h"
 #include "core/html/HTMLElement.h"
 #include "core/html/canvas/CanvasImageSource.h"
+#include "modules/filesystem/FileCallback.h"
 #include "platform/geometry/FloatRect.h"
 #include "platform/geometry/IntSize.h"
 #include "platform/graphics/GraphicsTypes.h"
@@ -113,6 +114,9 @@ public:
     String toDataURL(const String& mimeType, const ScriptValue& qualityArgument, ExceptionState&) const;
     String toDataURL(const String& mimeType, ExceptionState& exceptionState) const { return toDataURL(mimeType, ScriptValue(), exceptionState); }
 
+    void toBlob(FileCallback*, const String& mimeType, const ScriptValue& qualityArgument, ExceptionState&) const;

[Justin Novosad, 2015/08/13 21:03:40]

This new entry point is not tested

[xlai (Olivia), 2015/08/20 19:46:44]

Acknowledged. Planning to write another Layout test to specifically test for
quality arguments.

+    void toBlob(FileCallback* callback, const String& mimeType, ExceptionState& exceptionState) { return toBlob(callback, mimeType, ScriptValue(), exceptionState); }
+
     // Used for rendering
     void didDraw(const FloatRect&);
     void notifyObserversCanvasChanged(const FloatRect&);
@@ -185,6 +189,7 @@ private:
     using ContextFactoryVector = Vector<OwnPtr<CanvasRenderingContextFactory>>;
     static ContextFactoryVector& renderingContextFactories();
     static CanvasRenderingContextFactory* getRenderingContextFactory(int);
+    

[Justin Novosad, 2015/08/13 21:03:40]

spurious new line

[xlai (Olivia), 2015/08/20 19:46:44]

Done.

 
     void parseAttribute(const QualifiedName&, const AtomicString&) override;
     LayoutObject* createLayoutObject(const ComputedStyle&) override;