gpu: Add out-of-line copy ctors for complex classes.

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 15 matching lines @@
 class ErrorStateClient;
 class FeatureInfo;
 class Framebuffer;
 class Logger;
 class Program;
 class Renderbuffer;
 
 // State associated with each texture unit.
 struct GPU_EXPORT TextureUnit {
   TextureUnit();
+  TextureUnit(const TextureUnit& other);
   ~TextureUnit();
 
   // The last target that was bound to this texture unit.
   GLenum bind_target;
 
   // texture currently bound to this unit's GL_TEXTURE_2D with glBindTexture
   scoped_refptr<TextureRef> bound_texture_2d;
 
   // texture currently bound to this unit's GL_TEXTURE_CUBE_MAP with
   // glBindTexture
@@ skipping 262 matching lines @@
 
   FeatureInfo* feature_info_;
   scoped_ptr<ErrorState> error_state_;
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_CONTEXT_STATE_H_