PPAPI: Get TrackedCallback ready for running on non-main threads.

ppapi/shared_impl/ppb_graphics_3d_shared.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 "ppapi/shared_impl/ppb_graphics_3d_shared.h"
 
 #include "base/logging.h"
 #include "gpu/command_buffer/client/gles2_cmd_helper.h"
 #include "gpu/command_buffer/client/gles2_implementation.h"
 #include "gpu/command_buffer/client/transfer_buffer.h"
@@ skipping 71 matching lines @@
       target, level, xoffset, yoffset, width, height, format, type, access);
 }
 
 void PPB_Graphics3D_Shared::UnmapTexSubImage2DCHROMIUM(const void* mem) {
   ScopedNoLocking already_locked(this);
   gles2_impl_->UnmapTexSubImage2DCHROMIUM(mem);
 }
 
 void PPB_Graphics3D_Shared::SwapBuffersACK(int32_t pp_error) {
   DCHECK(HasPendingSwap());
-  TrackedCallback::ClearAndRun(&swap_callback_, pp_error);
+  swap_callback_->Run(pp_error);
 }
 
 bool PPB_Graphics3D_Shared::HasPendingSwap() const {
   return TrackedCallback::IsPending(swap_callback_);
 }
 
 bool PPB_Graphics3D_Shared::CreateGLES2Impl(
     int32 command_buffer_size,
     int32 transfer_buffer_size,
     gpu::gles2::GLES2Implementation* share_gles2) {
@@ skipping 42 matching lines @@
 void PPB_Graphics3D_Shared::PushAlreadyLocked() {
   // Do nothing. This should be overridden in the plugin side.
 }
 
 void PPB_Graphics3D_Shared::PopAlreadyLocked() {
   // Do nothing. This should be overridden in the plugin side.
 }
 
 }  // namespace ppapi