Use the shared context for ppapi parenting

content/renderer/pepper/pepper_plugin_delegate_impl.cc

 // Copyright (c) 2012 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 "content/renderer/pepper/pepper_plugin_delegate_impl.h"
 
 #include <cmath>
 #include <map>
 #include <queue>
 
@@ skipping 1507 matching lines @@
   }
 #else
   return 0;
 #endif
 }
 
 ContentGLContext*
 PepperPluginDelegateImpl::GetParentContextForPlatformContext3D() {
   WebGraphicsContext3DCommandBufferImpl* context =
       static_cast<WebGraphicsContext3DCommandBufferImpl*>(
-          render_view_->webview()->graphicsContext3D());
+          render_view_->webview()->sharedGraphicsContext3D());
   if (!context)
     return NULL;
   if (!context->makeContextCurrent() || context->isContextLost())
     return NULL;
 
   ContentGLContext* parent_context = context->context();
   if (!parent_context)
     return NULL;
   return parent_context;
 }
@@ skipping 17 matching lines @@
     render_view_->mouse_lock_dispatcher()->OnLockTargetDestroyed(target);
     delete target;
     mouse_lock_instances_.erase(it);
   }
 }
 
 webkit_glue::ClipboardClient*
     PepperPluginDelegateImpl::CreateClipboardClient() const {
   return new RendererClipboardClient;
 }