Properly advertise GL_CHROMIUM_copy_texture_to_parent_texture extension....

chrome/renderer/webgraphicscontext3d_command_buffer_impl.cc

 // Copyright (c) 2010 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 "chrome/renderer/webgraphicscontext3d_command_buffer_impl.h"
 
 #include <GLES2/gl2.h>
 #ifndef GL_GLEXT_PROTOTYPES
@@ skipping 39 matching lines @@
   }
 #endif
   if (context_) {
     ggl::DestroyContext(context_);
   }
 }
 
 static const char* kWebGraphicsContext3DPerferredGLExtensions =
     "GL_OES_packed_depth_stencil "
     "GL_OES_depth24 "
+    "GL_CHROMIUM_copy_texture_to_parent_texture "
+    "GL_CHROMIUM_map_sub "
     "GL_CHROMIUM_strict_attribs "
     "GL_CHROMIUM_webglsl";
 
 bool WebGraphicsContext3DCommandBufferImpl::initialize(
     WebGraphicsContext3D::Attributes attributes,
     WebKit::WebView* web_view,
     bool render_directly_to_web_view) {
   RenderThread* render_thread = RenderThread::current();
   if (!render_thread)
     return false;
@@ skipping 951 matching lines @@
 }
 
 void WebGraphicsContext3DCommandBufferImpl::copyTextureToCompositor(
     unsigned texture, unsigned parentTexture) {
   makeContextCurrent();
   glCopyTextureToParentTexture(texture, parentTexture);
   glFlush();
 }
 
 #endif  // defined(ENABLE_GPU)