Implement OffscreenCanvas.getContext('webgl')

third_party/WebKit/Source/modules/offscreencanvas/OffscreenCanvasRenderingContext.h

Index: third_party/WebKit/Source/modules/offscreencanvas/OffscreenCanvasRenderingContext.h
diff --git a/third_party/WebKit/Source/modules/offscreencanvas/OffscreenCanvasRenderingContext.h b/third_party/WebKit/Source/modules/offscreencanvas/OffscreenCanvasRenderingContext.h
index 0eff273a286fd41e1b9b9b15bdd4d448882b8215..93c728b5e122b00700e517a9f30068a71c4f48a5 100644
--- a/third_party/WebKit/Source/modules/offscreencanvas/OffscreenCanvasRenderingContext.h
+++ b/third_party/WebKit/Source/modules/offscreencanvas/OffscreenCanvasRenderingContext.h
@@ -12,7 +12,7 @@ namespace blink {
 
 class ImageBitmap;
 
-class MODULES_EXPORT OffscreenCanvasRenderingContext : public GarbageCollectedFinalized<OffscreenCanvasRenderingContext>, public ScriptWrappable {
+class MODULES_EXPORT OffscreenCanvasRenderingContext : public GarbageCollectedMixin {

[Justin Novosad, 2016/04/20 20:07:27]

Thanks for figuring this out.

     WTF_MAKE_NONCOPYABLE(OffscreenCanvasRenderingContext);
 public:
     virtual ~OffscreenCanvasRenderingContext() { }
@@ -25,8 +25,9 @@ public:
     static ContextType contextTypeFromId(const String& id);
 
     OffscreenCanvas* getOffscreenCanvas() const { return m_offscreenCanvas; }
-    virtual ContextType getContextType() const = 0;
+    virtual ContextType getOffscreenCanvasRenderingContextType() const = 0;

[Justin Novosad, 2016/04/20 20:07:27]

Why the name change?

[xidachen, 2016/04/20 20:52:09]

CanvasRenderingContext also has a method getContextType(), and
WebGLRenderingContext gets confused because it inherits from both
CanvasRenderingContext and OffscreenCanvasRenderingContext.

     virtual ImageBitmap* transferToImageBitmap(ExceptionState&) = 0;
+    virtual void setOffscreenCanvasGetContextResult(OffscreenRenderingContext&) = 0;
 
     virtual bool is2d() const { return false; }