ozone: gpu: Add plumbing for platform-specific gpu messaging

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 <string>
 #include <vector>
 
@@ skipping 305 matching lines @@
 
 // Tells the GPU process to crash.
 IPC_MESSAGE_CONTROL0(GpuMsg_Crash)
 
 // Tells the GPU process to hang.
 IPC_MESSAGE_CONTROL0(GpuMsg_Hang)
 
 // Tells the GPU process to disable the watchdog thread.
 IPC_MESSAGE_CONTROL0(GpuMsg_DisableWatchdog)
 
+// Tells the browser to initialize GpuPlatformSupport.

[rjkroege, 2014/06/16 21:38:49]

isn't it telling the GPU process? 

[spang, 2014/06/17 14:47:34]

Yes - oops.

+IPC_MESSAGE_CONTROL1(GpuMsg_InitializePlatformSupport,
+                     int32 /* host_route_id */)
+
 //------------------------------------------------------------------------------
 // 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,
                             content::CauseForGpuLaunch,
                             int /* client id */,
@@ skipping 60 matching lines @@
 IPC_MESSAGE_CONTROL3(GpuHostMsg_OnLogMessage,
                      int /*severity*/,
                      std::string /* header */,
                      std::string /* message */)
 
 // Tells the browser that a new accelerated surface was initialized.
 IPC_MESSAGE_CONTROL2(GpuHostMsg_AcceleratedSurfaceInitialized,
                      int32 /* surface_id */,
                      int32 /* route_id */)
 
+// Tells the browser that GpuPlatformSupport was initialized.
+IPC_MESSAGE_CONTROL2(GpuHostMsg_PlatformSupportInitialized,
+                     int32 /* host_route_id */,
+                     int32 /* gpu_route_id */)
+
 // Tells the browser that a frame with the specific latency info was drawn to
 // the screen
 IPC_MESSAGE_CONTROL1(GpuHostMsg_FrameDrawn,
                      std::vector<ui::LatencyInfo> /* latency_info */)
 
 // Same as above with a rect of the part of the surface that changed.
 IPC_MESSAGE_CONTROL1(GpuHostMsg_AcceleratedSurfaceBuffersSwapped,
                      GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params)
 
 // This message notifies the browser process that the renderer
@@ skipping 364 matching lines @@
                     int32 /* bitstream_buffer_id */,
                     uint32 /* payload_size */,
                     bool /* key_frame */)
 
 // Report error condition.
 IPC_MESSAGE_ROUTED1(AcceleratedVideoEncoderHostMsg_NotifyError,
                     media::VideoEncodeAccelerator::Error /* error */)
 
 // Send destroy request to the encoder.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoEncoderMsg_Destroy)