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

gpu/command_buffer/common/sync_token.h

 // Copyright 2015 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_SYNC_TOKEN_H_
 #define GPU_COMMAND_BUFFER_COMMON_SYNC_TOKEN_H_
 
 #include <stdint.h>
 #include <string.h>
 
@@ skipping 13 matching lines @@
 // See src/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_sync_point.txt for more
 // details.
 struct GPU_EXPORT SyncToken {
   SyncToken();
 
   SyncToken(CommandBufferNamespace namespace_id,
             int32_t extra_data_field,
             CommandBufferId command_buffer_id,
             uint64_t release_count);
 
+  SyncToken(const SyncToken& other);

[piman, 2016/02/24 01:06:56]

Ouch, this one could be in the critical path - please watch perf bots...

+
   void Set(CommandBufferNamespace namespace_id,
            int32_t extra_data_field,
            CommandBufferId command_buffer_id,
            uint64_t release_count) {
     namespace_id_ = namespace_id;
     extra_data_field_ = extra_data_field;
     command_buffer_id_ = command_buffer_id;
     release_count_ = release_count;
   }
 
@@ skipping 57 matching lines @@
   CommandBufferId command_buffer_id_;
   uint64_t release_count_;
 };
 
 static_assert(sizeof(SyncToken) <= GL_SYNC_TOKEN_SIZE_CHROMIUM,
               "SyncToken size must not exceed GL_SYNC_TOKEN_SIZE_CHROMIUM");
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_COMMON_SYNC_TOKEN_H_