Add multi-process GpuMemoryBuffer framework.

content/common/child_process_messages.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.
 
 // Common IPC messages used for child processes.
 // Multiply-included message file, hence no include guard.
 
 #include <string>
 #include <vector>
 
 #include "base/memory/shared_memory.h"
 #include "base/tracked_objects.h"
 #include "base/values.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_message_macros.h"
+#include "ui/gfx/gpu_memory_buffer.h"
 
 IPC_ENUM_TRAITS(tracked_objects::ThreadData::Status)
 
 IPC_STRUCT_TRAITS_BEGIN(tracked_objects::LocationSnapshot)
   IPC_STRUCT_TRAITS_MEMBER(file_name)
   IPC_STRUCT_TRAITS_MEMBER(function_name)
   IPC_STRUCT_TRAITS_MEMBER(line_number)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(tracked_objects::BirthOnThreadSnapshot)
@@ skipping 21 matching lines @@
   IPC_STRUCT_TRAITS_MEMBER(parent)
   IPC_STRUCT_TRAITS_MEMBER(child)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(tracked_objects::ProcessDataSnapshot)
   IPC_STRUCT_TRAITS_MEMBER(tasks)
   IPC_STRUCT_TRAITS_MEMBER(descendants)
   IPC_STRUCT_TRAITS_MEMBER(process_id)
 IPC_STRUCT_TRAITS_END()
 
+IPC_ENUM_TRAITS(gfx::GpuMemoryBufferType)
+
+IPC_STRUCT_TRAITS_BEGIN(gfx::GpuMemoryBufferHandle)
+  IPC_STRUCT_TRAITS_MEMBER(type)
+  IPC_STRUCT_TRAITS_MEMBER(handle)
+IPC_STRUCT_TRAITS_END()
+
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
 
 #define IPC_MESSAGE_START ChildProcessMsgStart
 
 // Messages sent from the browser to the child process.
 
 // Sent in response to ChildProcessHostMsg_ShutdownRequest to tell the child
 // process that it's safe to shutdown.
 IPC_MESSAGE_CONTROL0(ChildProcessMsg_Shutdown)
@@ skipping 64 matching lines @@
 // fill in and pass back to the browser.
 IPC_SYNC_MESSAGE_CONTROL1_1(ChildProcessHostMsg_SyncAllocateSharedMemory,
                             uint32 /* buffer size */,
                             base::SharedMemoryHandle)
 
 #if defined(USE_TCMALLOC)
 // Reply to ChildProcessMsg_GetTcmallocStats.
 IPC_MESSAGE_CONTROL1(ChildProcessHostMsg_TcmallocStats,
                      std::string /* output */)
 #endif
+
+// Asks the browser to create a gpu memory buffer.
+IPC_SYNC_MESSAGE_CONTROL1_1(ChildProcessHostMsg_SyncAllocateGpuMemoryBuffer,
+                            uint32 /* buffer size */,
+                            gfx::GpuMemoryBufferHandle)