Enable privileged WebGL extensions for Chrome extensions.

chrome/browser/extensions/extension_host.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.
 
 #include "chrome/browser/extensions/extension_host.h"
 
 #include <list>
 
 #include "base/bind.h"
 #include "base/memory/singleton.h"
@@ skipping 518 matching lines @@
   Profile* profile = Profile::FromBrowserContext(
       render_view_host()->process()->browser_context());
   WebPreferences webkit_prefs =
       RenderViewHostDelegateHelper::GetWebkitPrefs(profile,
                                                    false);  // is_web_ui
   // Extensions are trusted so we override any user preferences for disabling
   // javascript or images.
   webkit_prefs.loads_images_automatically = true;
   webkit_prefs.javascript_enabled = true;
 
+  // Enable privileged WebGL extensions.
+  webkit_prefs.privileged_webgl_extensions_enabled = true;
+
   if (extension_host_type_ == chrome::VIEW_TYPE_EXTENSION_POPUP ||
       extension_host_type_ == chrome::VIEW_TYPE_EXTENSION_DIALOG ||
       extension_host_type_ == chrome::VIEW_TYPE_EXTENSION_BACKGROUND_PAGE ||
       extension_host_type_ == chrome::VIEW_TYPE_EXTENSION_INFOBAR)
     webkit_prefs.allow_scripts_to_close_windows = true;
 
   // Disable anything that requires the GPU process for background pages.
   // See http://crbug.com/64512 and http://crbug.com/64841.
   if (extension_host_type_ == chrome::VIEW_TYPE_EXTENSION_BACKGROUND_PAGE) {
     webkit_prefs.experimental_webgl_enabled = false;
@@ skipping 266 matching lines @@
 void ExtensionHost::RenderViewCreated(RenderViewHost* render_view_host) {
   if (view_.get())
     view_->RenderViewCreated();
 
   if (extension_host_type_ == chrome::VIEW_TYPE_EXTENSION_POPUP ||
       extension_host_type_ == chrome::VIEW_TYPE_EXTENSION_INFOBAR) {
         render_view_host->EnablePreferredSizeMode(
             kPreferredSizeWidth | kPreferredSizeHeightThisIsSlow);
   }
 }