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

gpu/command_buffer/common/gles2_cmd_utils.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.
 
 // This file is here so other GLES2 related files can have a common set of
 // includes where appropriate.
 
 #include <sstream>
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
@@ skipping 1397 matching lines @@
       depth_size(-1),
       stencil_size(-1),
       samples(-1),
       sample_buffers(-1),
       buffer_preserved(true),
       bind_generates_resource(true),
       fail_if_major_perf_caveat(false),
       lose_context_when_out_of_memory(false),
       context_type(CONTEXT_TYPE_OPENGLES2) {}
 
+ContextCreationAttribHelper::ContextCreationAttribHelper(
+    const ContextCreationAttribHelper& other) = default;
+
 void ContextCreationAttribHelper::Serialize(
     std::vector<int32_t>* attribs) const {
   if (alpha_size != -1) {
     attribs->push_back(kAlphaSize);
     attribs->push_back(alpha_size);
   }
   if (blue_size != -1) {
     attribs->push_back(kBlueSize);
     attribs->push_back(blue_size);
   }
@@ skipping 98 matching lines @@
   }
 
   return true;
 }
 
 #include "gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu