Mark PPAPI 3D context

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 107 matching lines @@
       false,
       true));
 
   if (!gles2_impl_->Initialize(
       transfer_buffer_size,
       kMinTransferBufferSize,
       std::max(kMaxTransferBufferSize, transfer_buffer_size))) {
     return false;
   }
 
+  gles2_impl_->PushGroupMarkerEXT(0, "PPAPIContext");
+
   return true;
 }
 
 void PPB_Graphics3D_Shared::DestroyGLES2Impl() {
   gles2_impl_.reset();
   transfer_buffer_.reset();
   gles2_helper_.reset();
 }
 
 }  // namespace ppapi