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

gpu/command_buffer/common/capabilities.h

 // Copyright 2013 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.
 
 #ifndef GPU_COMMAND_BUFFER_COMMON_CAPABILITIES_H_
 #define GPU_COMMAND_BUFFER_COMMON_CAPABILITIES_H_
 
 #include <stdint.h>
 
 #include "gpu/gpu_export.h"
@@ skipping 27 matching lines @@
 
     ShaderPrecision low_int;
     ShaderPrecision medium_int;
     ShaderPrecision high_int;
     ShaderPrecision low_float;
     ShaderPrecision medium_float;
     ShaderPrecision high_float;
   };
 
   Capabilities();
+  Capabilities(const Capabilities& other);
 
   template <typename T>
   void VisitStagePrecisions(unsigned stage,
                             PerStagePrecisions* precisions,
                             const T& visitor) {
     visitor(stage, GL_LOW_INT, &precisions->low_int);
     visitor(stage, GL_MEDIUM_INT, &precisions->medium_int);
     visitor(stage, GL_HIGH_INT, &precisions->high_int);
     visitor(stage, GL_LOW_FLOAT, &precisions->low_float);
     visitor(stage, GL_MEDIUM_FLOAT, &precisions->medium_float);
@@ skipping 85 matching lines @@
   bool surfaceless;
   bool flips_vertically;
 
   int major_version;
   int minor_version;
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_COMMON_CAPABILITIES_H_