Revert 132218 - Convert plugin and GPU process to brokered handle duplication.

content/common/gpu/gpu_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.
 
 // Multiply-included message file, hence no include guard here, but see below
 // for a much smaller-than-usual include guard section.
 
 #include <vector>
 #include <string>
 
@@ skipping 198 matching lines @@
 // Tells the GPU process to hang.
 IPC_MESSAGE_CONTROL0(GpuMsg_Hang)
 
 //------------------------------------------------------------------------------
 // GPU Host Messages
 // These are messages to the browser.
 
 // A renderer sends this when it wants to create a connection to the GPU
 // process. The browser will create the GPU process if necessary, and will
 // return a handle to the channel via a GpuChannelEstablished message.
-IPC_SYNC_MESSAGE_CONTROL1_3(GpuHostMsg_EstablishGpuChannel,
+IPC_SYNC_MESSAGE_CONTROL1_4(GpuHostMsg_EstablishGpuChannel,
                             content::CauseForGpuLaunch,
                             int /* client id */,
                             IPC::ChannelHandle /* handle to channel */,
+                            base::ProcessHandle /* renderer_process_for_gpu */,
                             content::GPUInfo /* stats about GPU process*/)
 
 // A renderer sends this to the browser process when it wants to
 // create a GL context associated with the given view_id.
 IPC_SYNC_MESSAGE_CONTROL2_1(GpuHostMsg_CreateViewCommandBuffer,
                             int32, /* surface_id */
                             GPUCreateCommandBufferConfig, /* init_params */
                             int32 /* route_id */)
 
 // Response from GPU to a GpuHostMsg_EstablishChannel message.
@@ skipping 51 matching lines @@
 
 // Tells the browser to release resources for the given surface until the next
 // time swap buffers or post sub buffer is sent.
 IPC_MESSAGE_CONTROL1(GpuHostMsg_AcceleratedSurfaceSuspend,
                      int32 /* surface_id */)
 
 //------------------------------------------------------------------------------
 // GPU Channel Messages
 // These are messages from a renderer process to the GPU process.
 
+// Initialize a channel between a renderer process and a GPU process. The
+// renderer passes its process handle to the GPU process, which gives gives the
+// GPU process the ability to map handles from the renderer process. This must
+// be the first message sent on a newly connected channel.
+IPC_MESSAGE_CONTROL1(GpuChannelMsg_Initialize,
+                     base::ProcessHandle /* renderer_process_for_gpu */)
+
 // Tells the GPU process to create a new command buffer that renders to an
 // offscreen frame buffer.
 IPC_SYNC_MESSAGE_CONTROL2_1(GpuChannelMsg_CreateOffscreenCommandBuffer,
                             gfx::Size, /* size */
                             GPUCreateCommandBufferConfig, /* init_params */
                             int32 /* route_id */)
 
 // The CommandBufferProxy sends this to the GpuCommandBufferStub in its
 // destructor, so that the stub deletes the actual CommandBufferService
 // object that it's hosting.
@@ skipping 199 matching lines @@
 
 // Confirm decoder has been flushed.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoDecoderHostMsg_FlushDone)
 
 // Confirm decoder has been reset.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoDecoderHostMsg_ResetDone)
 
 // Video decoder has encountered an error.
 IPC_MESSAGE_ROUTED1(AcceleratedVideoDecoderHostMsg_ErrorNotification,
                     uint32) /* Error ID */