Remove WebGraphicsContext3D getter from cc::ContextProvider

cc/test/test_gles2_interface.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_TEST_TEST_GLES2_INTERFACE_H_
 #define CC_TEST_TEST_GLES2_INTERFACE_H_
 
 #include "gpu/command_buffer/client/gles2_interface_stub.h"
 
 namespace cc {
@@ skipping 147 matching lines @@
                                      const GLenum* attachments) OVERRIDE;
   virtual void GenMailboxCHROMIUM(GLbyte* mailbox) OVERRIDE;
   virtual void ProduceTextureCHROMIUM(GLenum target,
                                       const GLbyte* mailbox) OVERRIDE;
   virtual void ConsumeTextureCHROMIUM(GLenum target,
                                       const GLbyte* mailbox) OVERRIDE;
 
   virtual void ResizeCHROMIUM(GLuint width,
                               GLuint height,
                               float device_scale) OVERRIDE;
+  virtual void LoseContextCHROMIUM(GLenum current, GLenum other) OVERRIDE;
 
  private:
   TestWebGraphicsContext3D* test_context_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_TEST_GLES2_INTERFACE_H_