GPU: Only restore one texture unit in ScopedTextureBinder.

gpu/command_buffer/service/context_state.h

 // 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.
 
 // This file contains the ContextState class.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_CONTEXT_STATE_H_
 #define GPU_COMMAND_BUFFER_SERVICE_CONTEXT_STATE_H_
 
 #include <vector>
@@ skipping 86 matching lines @@
   ~ContextState();
 
   void Initialize();
 
   void RestoreState(const ContextState* prev_state) const;
   void InitCapabilities() const;
   void InitState() const;
 
   void RestoreActiveTexture() const;
   void RestoreAllTextureUnitBindings(const ContextState* prev_state) const;
+  void RestoreActiveTextureUnitBinding(unsigned int target) const;
   void RestoreAttribute(GLuint index) const;
   void RestoreBufferBindings() const;
   void RestoreGlobalState() const;
   void RestoreProgramBindings() const;
   void RestoreRenderbufferBindings() const;
   void RestoreTextureUnitBindings(
       GLuint unit, const ContextState* prev_state) const;
 
   // Helper for getting cached state.
   bool GetStateAsGLint(
@@ skipping 43 matching lines @@
 
  private:
   scoped_ptr<ErrorState> error_state_;
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_CONTEXT_STATE_H_