Expose GpuMemoryBufferId through glGetImageivCHROMIUM.

cc/test/test_web_graphics_context_3d.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_WEB_GRAPHICS_CONTEXT_3D_H_
 #define CC_TEST_TEST_WEB_GRAPHICS_CONTEXT_3D_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 250 matching lines @@
 
   virtual GLuint createImageCHROMIUM(ClientBuffer buffer,
                                      GLsizei width,
                                      GLsizei height,
                                      GLenum internalformat);
   virtual void destroyImageCHROMIUM(GLuint image_id);
   virtual GLuint createGpuMemoryBufferImageCHROMIUM(GLsizei width,
                                                     GLsizei height,
                                                     GLenum internalformat,
                                                     GLenum usage);
+  virtual void getImageivCHROMIUM(GLuint image_id, GLenum param, GLint* data);
 
   virtual void texImageIOSurface2DCHROMIUM(GLenum target,
                                            GLsizei width,
                                            GLsizei height,
                                            GLuint io_surface_id,
                                            GLuint plane) {}
 
   virtual GLuint64 insertFenceSync();
   virtual void genSyncToken(GLuint64 fence_sync, GLbyte* sync_token);
   virtual void waitSyncToken(const GLbyte* sync_token);
@@ skipping 209 matching lines @@
 
   scoped_refptr<Namespace> namespace_;
   static Namespace* shared_namespace_;
 
   base::WeakPtrFactory<TestWebGraphicsContext3D> weak_ptr_factory_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_TEST_WEB_GRAPHICS_CONTEXT_3D_H_