Refactoring Canvas2DLayerBridge to make it easier to write unit tests

Source/core/tests/FakeWebGraphicsContext3D.h

Index: Source/core/tests/FakeWebGraphicsContext3D.h
diff --git a/Source/core/tests/FakeWebGraphicsContext3D.h b/Source/core/tests/FakeWebGraphicsContext3D.h
index 693e246843492cc10bb1d2fbb6b8d2da3ba651d8..52e2f1ac39bbd2c7ec7d14fbefa6cb7c0035de0f 100644
--- a/Source/core/tests/FakeWebGraphicsContext3D.h
+++ b/Source/core/tests/FakeWebGraphicsContext3D.h
@@ -37,6 +37,7 @@ class FakeWebGraphicsContext3D : public WebGraphicsContext3D {
 public:
     FakeWebGraphicsContext3D()
         : m_nextTextureId(1)
+        , m_isContextLost(false)
     {
     }
 
@@ -53,7 +54,7 @@ public:
 
     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*) { }
@@ -263,9 +264,12 @@ public:
     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