Remove WebGraphicsContext3D getter from cc::ContextProvider

cc/test/test_gles2_interface.cc

 // 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.
 
 #include "cc/test/test_gles2_interface.h"
 
 #include "base/logging.h"
 #include "cc/test/test_web_graphics_context_3d.h"
 
 namespace cc {
@@ skipping 351 matching lines @@
                                                 const GLbyte* mailbox) {
   test_context_->consumeTextureCHROMIUM(target, mailbox);
 }
 
 void TestGLES2Interface::ResizeCHROMIUM(GLuint width,
                                         GLuint height,
                                         float device_scale) {
   test_context_->reshapeWithScaleFactor(width, height, device_scale);
 }
 
+void TestGLES2Interface::LoseContextCHROMIUM(GLenum current, GLenum other) {
+  test_context_->loseContextCHROMIUM(current, other);
+}
+
 }  // namespace cc