Remove genSyncTokenCHROMIUM from WebGraphicsContext3D.

third_party/WebKit/public/platform/WebGraphicsContext3D.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 119 matching lines @@
     public:
         virtual void onErrorMessage(const WebString&, WGC3Dint) = 0;
 
     protected:
         virtual ~WebGraphicsErrorMessageCallback() { }
     };
 
     // This destructor needs to be public so that using classes can destroy instances if initialization fails.
     virtual ~WebGraphicsContext3D() { }
 
-    virtual bool genSyncTokenCHROMIUM(WGC3Duint64, WGC3Dbyte*) { return false; }
-
     // Synthesizes an OpenGL error which will be returned from a
     // later call to getError. This is used to emulate OpenGL ES
     // 2.0 behavior on the desktop and to enforce additional error
     // checking mandated by WebGL.
     //
     // Per the behavior of glGetError, this stores at most one
     // instance of any given error, and returns them from calls to
     // getError in the order they were added.
     virtual void synthesizeGLError(WGC3Denum) = 0;
 
@@ skipping 108 matching lines @@
     virtual void vertexAttribIPointer(WGC3Duint index, WGC3Dint size, WGC3Denum type, WGC3Dsizei stride, WGC3Dintptr pointer) { }
     virtual void waitSync(WGC3Dsync sync, WGC3Dbitfield flags, WGC3Duint64 timeout) { }
 
     // Prefer getting a GLES2Interface off WebGraphicsContext3DProvider if possible, and avoid using WebGraphicsContext3D at all.
     virtual gpu::gles2::GLES2Interface* getGLES2Interface() = 0;
 };
 
 } // namespace blink
 
 #endif