Use the shared context for ppapi parenting

content/renderer/pepper/pepper_plugin_delegate_impl.cc

Index: content/renderer/pepper/pepper_plugin_delegate_impl.cc
diff --git a/content/renderer/pepper/pepper_plugin_delegate_impl.cc b/content/renderer/pepper/pepper_plugin_delegate_impl.cc
index 82f1acc45a9999ad1f60967769e85be052d31973..2c62d776e320b899356fc71630548e445dce08bc 100644
--- a/content/renderer/pepper/pepper_plugin_delegate_impl.cc
+++ b/content/renderer/pepper/pepper_plugin_delegate_impl.cc
@@ -1525,7 +1525,7 @@ 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())