gpu: Use decoder state restoration for scoped_binders

gpu/command_buffer/service/gles2_cmd_decoder_passthrough.h

 // Copyright (c) 2016 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.
 
 // This file contains the GLES2DecoderPassthroughImpl class.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_PASSTHROUGH_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_PASSTHROUGH_H_
 
 #include "base/memory/ref_counted.h"
@@ skipping 103 matching lines @@
   void RestoreAllTextureUnitBindings(
       const ContextState* prev_state) const override;
   void RestoreActiveTextureUnitBinding(unsigned int target) const override;
   void RestoreBufferBindings() const override;
   void RestoreFramebufferBindings() const override;
   void RestoreRenderbufferBindings() override;
   void RestoreGlobalState() const override;
   void RestoreProgramBindings() const override;
   void RestoreTextureState(unsigned service_id) const override;
   void RestoreTextureUnitBindings(unsigned unit) const override;
+  void RestoreVertexAttribArray(unsigned index) const override;
   void RestoreAllExternalTextureBindingsIfNeeded() override;
 
   void ClearAllAttributes() const override;
   void RestoreAllAttributes() const override;
 
   void SetIgnoreCachedStateForTest(bool ignore) override;
   void SetForceShaderNameHashingForTest(bool force) override;
   size_t GetSavedBackTextureCountForTest() override;
   size_t GetCreatedBackTextureCountForTest() override;
 
@@ skipping 249 matching lines @@
 
 // Include the prototypes of all the doer functions from a separate header to
 // keep this file clean.
 #include "gpu/command_buffer/service/gles2_cmd_decoder_passthrough_doer_prototypes.h"
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_PASSTHROUGH_H_