Expose GLES2Interface to blink, and delete isContextLost() from WGC3D.

third_party/WebKit/Source/platform/graphics/test/MockWebGraphicsContext3D.h

Index: third_party/WebKit/Source/platform/graphics/test/MockWebGraphicsContext3D.h
diff --git a/third_party/WebKit/Source/platform/graphics/test/MockWebGraphicsContext3D.h b/third_party/WebKit/Source/platform/graphics/test/MockWebGraphicsContext3D.h
index d41a81013b5a527cef1f69270a9b7ed7f83cb690..ff7c637e15a39ea6b563a644dfc519f01d0cc6c0 100644
--- a/third_party/WebKit/Source/platform/graphics/test/MockWebGraphicsContext3D.h
+++ b/third_party/WebKit/Source/platform/graphics/test/MockWebGraphicsContext3D.h
@@ -47,8 +47,6 @@ public:
 
     virtual void synthesizeGLError(WGC3Denum) { }
 
-    virtual bool isContextLost() { return m_contextLost; }
-
     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; }
@@ -285,6 +283,9 @@ public:
 
     virtual WebString getTranslatedShaderSourceANGLE(WebGLId) { return WebString(); }
 
+    // Don't use this, make a MockGLES2Interface instead.
+    virtual gpu::gles2::GLES2Interface* getGLES2Interface() { return nullptr; }
+
     void fakeContextLost() { m_contextLost = true; }
 protected:
     unsigned m_nextTextureId;