Revert "gpu: Use mojom API for creating gpu channel."

content/gpu/gpu_child_thread.cc

Index: content/gpu/gpu_child_thread.cc
diff --git a/content/gpu/gpu_child_thread.cc b/content/gpu/gpu_child_thread.cc
index da3646ab674dc4a60753af39cbad055cd753c567..a96ab43794e78597e1d4c32215f4badf9e7ec304 100644
--- a/content/gpu/gpu_child_thread.cc
+++ b/content/gpu/gpu_child_thread.cc
@@ -269,6 +269,7 @@ bool GpuChildThread::OnMessageReceived(const IPC::Message& msg) {
 
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(GpuChildThread, msg)
+    IPC_MESSAGE_HANDLER(GpuMsg_EstablishChannel, OnEstablishChannel)
     IPC_MESSAGE_HANDLER(GpuMsg_CloseChannel, OnCloseChannel)
     IPC_MESSAGE_HANDLER(GpuMsg_DestroyGpuMemoryBuffer, OnDestroyGpuMemoryBuffer)
     IPC_MESSAGE_HANDLER(GpuMsg_LoadedShader, OnLoadedShader)
@@ -455,6 +456,17 @@ void GpuChildThread::OnGpuSwitched() {
     ui::GpuSwitchingManager::GetInstance()->NotifyGpuSwitched();
 }
 
+void GpuChildThread::OnEstablishChannel(const EstablishChannelParams& params) {
+  if (!gpu_channel_manager())
+    return;
+
+  IPC::ChannelHandle channel_handle = gpu_channel_manager()->EstablishChannel(
+      params.client_id, params.client_tracing_id, params.preempts,
+      params.allow_view_command_buffers, params.allow_real_time_streams);
+  gpu_service_->media_gpu_channel_manager()->AddChannel(params.client_id);
+  Send(new GpuHostMsg_ChannelEstablished(channel_handle));
+}
+
 void GpuChildThread::OnCloseChannel(int32_t client_id) {
   if (gpu_channel_manager())
     gpu_channel_manager()->RemoveChannel(client_id);