Refactoring Canvas2DLayerBridge to make it easier to write unit tests

Source/core/tests/FakeWebGraphicsContext3D.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 19 matching lines @@
 #include "public/platform/WebGraphicsContext3D.h"
 
 namespace WebKit {
 
 // WebGraphicsContext3D base class for use in WebKit unit tests.
 // All operations are no-ops (returning 0 if necessary).
 class FakeWebGraphicsContext3D : public WebGraphicsContext3D {
 public:
     FakeWebGraphicsContext3D()
         : m_nextTextureId(1)
+        , m_isContextLost(false)
     {
     }
 
     virtual bool makeContextCurrent() { return true; }
 
     virtual int width() { return 0; }
     virtual int height() { return 0; }
 
     virtual void reshape(int width, int height) { }
 
     virtual void prepareTexture() { }
 
     virtual void postSubBufferCHROMIUM(int x, int y, int width, int height) { }
 
     virtual void synthesizeGLError(WGC3Denum) { }
 
-    virtual bool isContextLost() { return false; }
+    virtual bool isContextLost() { return m_isContextLost; }
 
     virtual void* mapBufferSubDataCHROMIUM(WGC3Denum target, WGC3Dintptr offset, WGC3Dsizeiptr size, WGC3Denum access) { return 0; }
     virtual void unmapBufferSubDataCHROMIUM(const void*) { }
     virtual void* mapTexSubImage2DCHROMIUM(WGC3Denum target, WGC3Dint level, WGC3Dint xoffset, WGC3Dint yoffset, WGC3Dsizei width, WGC3Dsizei height, WGC3Denum format, WGC3Denum type, WGC3Denum access) { return 0; }
     virtual void unmapTexSubImage2DCHROMIUM(const void*) { }
 
     virtual void setVisibilityCHROMIUM(bool visible) { }
 
     virtual void discardFramebufferEXT(WGC3Denum target, WGC3Dsizei numAttachments, const WGC3Denum* attachments) { }
     virtual void ensureFramebufferCHROMIUM() { }
@@ skipping 189 matching lines @@
     virtual void texStorage2DEXT(WGC3Denum target, WGC3Dint levels, WGC3Duint internalformat, WGC3Dint width, WGC3Dint height) { }
 
     virtual WebGLId createQueryEXT() { return 1; }
     virtual void deleteQueryEXT(WebGLId) { }
     virtual GC3Dboolean isQueryEXT(WebGLId) { return true; }
     virtual void beginQueryEXT(GC3Denum, WebGLId) { }
     virtual void endQueryEXT(GC3Denum) { }
     virtual void getQueryivEXT(GC3Denum, GC3Denum, GC3Dint*) { }
     virtual void getQueryObjectuivEXT(WebGLId, GC3Denum, GC3Duint*) { }
 
+    void fakeContextLoss() { m_isContextLost = true;}
+
 protected:
     unsigned m_nextTextureId;
     Attributes m_attrs;
+    bool m_isContextLost;
 };
 
 } // namespace WebKit
 
 #endif // FakeWebGraphicsContext3D_h