Rename setVisibility to setVisibilityCHROMIUM and expose as GL_CHROIMIUM_set_visibility extension.

webkit/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc

 // Copyright (c) 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.
 
 #if defined(ENABLE_GPU)
 
 #include "webkit/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h"
 
 #include <GLES2/gl2.h>
 #ifndef GL_GLEXT_PROTOTYPES
@@ skipping 891 matching lines @@
   return gl_->MapTexSubImage2DCHROMIUM(
       target, level, xoffset, yoffset, width, height, format, type, access);
 }
 
 void WebGraphicsContext3DInProcessCommandBufferImpl::unmapTexSubImage2DCHROMIUM(
     const void* mem) {
   ClearContext();
   gl_->UnmapTexSubImage2DCHROMIUM(mem);
 }
 
+void WebGraphicsContext3DInProcessCommandBufferImpl::setVisibilityCHROMIUM(
+    bool visible) {
+}
+
 void WebGraphicsContext3DInProcessCommandBufferImpl::
     copyTextureToParentTextureCHROMIUM(WebGLId texture, WebGLId parentTexture) {
   NOTIMPLEMENTED();
 }
 
 void WebGraphicsContext3DInProcessCommandBufferImpl::
     rateLimitOffscreenContextCHROMIUM() {
   // TODO(gmam): See if we can comment this in.
   // ClearContext();
   gl_->RateLimitOffscreenContextCHROMIUM();
@@ skipping 733 matching lines @@
   context_lost_reason_ = GL_UNKNOWN_CONTEXT_RESET_ARB;
   if (context_lost_callback_) {
     context_lost_callback_->onContextLost();
   }
 }
 
 }  // namespace gpu
 }  // namespace webkit
 
 #endif  // defined(ENABLE_GPU)