Inform webkit when PPAPI plugin contents are opaque.

webkit/plugins/ppapi/ppb_graphics_3d_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 "webkit/plugins/ppapi/ppb_graphics_3d_impl.h"
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "gpu/command_buffer/client/gles2_implementation.h"
 #include "ppapi/c/ppp_graphics_3d.h"
@@ skipping 122 matching lines @@
 
 bool PPB_Graphics3D_Impl::BindToInstance(bool bind) {
   bound_to_instance_ = bind;
   return true;
 }
 
 unsigned int PPB_Graphics3D_Impl::GetBackingTextureId() {
   return platform_context_->GetBackingTextureId();
 }
 
+bool PPB_Graphics3D_Impl::IsOpaque() {
+  return platform_context_->IsOpaque();
+}
+
 void PPB_Graphics3D_Impl::ViewWillInitiatePaint() {
 }
 
 void PPB_Graphics3D_Impl::ViewInitiatedPaint() {
   commit_pending_ = false;
 
   if (HasPendingSwap())
     SwapBuffersACK(PP_OK);
 }
 
@@ skipping 99 matching lines @@
   const PPP_Graphics3D* ppp_graphics_3d =
       static_cast<const PPP_Graphics3D*>(
           instance->module()->GetPluginInterface(
               PPP_GRAPHICS_3D_INTERFACE));
   if (ppp_graphics_3d)
     ppp_graphics_3d->Graphics3DContextLost(pp_instance());
 }
 
 }  // namespace ppapi
 }  // namespace webkit