Fix scrollbars missing after lost context

cc/test/fake_web_graphics_context_3d.h

 // Copyright 2011 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_FAKE_WEB_GRAPHICS_CONTEXT_3D_H_
 #define CC_TEST_FAKE_WEB_GRAPHICS_CONTEXT_3D_H_
 
 #include <vector>
 
 #include "base/hash_tables.h"
@@ skipping 571 matching lines @@
       WebKit::WGC3Denum pname,
       WebKit::WGC3Dint* params) {}
   virtual void getQueryObjectuivEXT(
       WebKit::WebGLId query,
       WebKit::WGC3Denum pname,
       WebKit::WGC3Duint* params);
 
   virtual void setContextLostCallback(
       WebGraphicsContextLostCallback* callback);
 
-  virtual void loseContextCHROMIUM();
+  virtual void loseContextCHROMIUM(WebKit::WGC3Denum current,
+                                   WebKit::WGC3Denum other);
 
   // When set, MakeCurrent() will fail after this many times.
   void set_times_make_current_succeeds(int times) {
     times_make_current_succeeds_ = times;
   }
   void set_times_bind_texture_succeeds(int times) {
     times_bind_texture_succeeds_ = times;
   }
   void set_times_end_query_succeeds(int times) {
     times_end_query_succeeds_ = times;
@@ skipping 35 matching lines @@
   WebGraphicsContextLostCallback* context_lost_callback_;
   std::vector<WebKit::WebGLId> textures_;
   base::hash_set<WebKit::WebGLId> used_textures_;
   int width_;
   int height_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_FAKE_WEB_GRAPHICS_CONTEXT_3D_H_