Use ChannelMojo for Browser-GPU and Renderer-GPU IPC.

content/ppapi_plugin/ppapi_thread.cc

Index: content/ppapi_plugin/ppapi_thread.cc
diff --git a/content/ppapi_plugin/ppapi_thread.cc b/content/ppapi_plugin/ppapi_thread.cc
index ea5e4bc341e1bb6fa2524a3f7a1e4f85b2c32f2c..2c9e606b7ef1c5364148503f7a844de6fb41114d 100644
--- a/content/ppapi_plugin/ppapi_thread.cc
+++ b/content/ppapi_plugin/ppapi_thread.cc
@@ -39,6 +39,7 @@
 #include "ipc/ipc_platform_file.h"
 #include "ipc/ipc_sync_channel.h"
 #include "ipc/ipc_sync_message_filter.h"
+#include "mojo/public/cpp/system/message_pipe.h"
 #include "ppapi/c/dev/ppp_network_state_dev.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppp.h"
@@ -488,11 +489,8 @@ bool PpapiThread::SetupChannel(base::ProcessId renderer_pid,
                                bool incognito,
                                IPC::ChannelHandle* handle) {
   DCHECK(is_broker_ == (connect_instance_func_ != NULL));
-  IPC::ChannelHandle plugin_handle;
-  plugin_handle.name = IPC::Channel::GenerateVerifiedChannelID(
-      base::StringPrintf(
-          "%d.r%d", base::GetCurrentProcId(), renderer_child_id));
-
+  mojo::MessagePipe message_pipe;
+  IPC::ChannelHandle plugin_handle(message_pipe.handle0.release());
   ppapi::proxy::ProxyChannel* dispatcher = NULL;
   bool init_result = false;
   if (is_broker_) {
@@ -523,15 +521,7 @@ bool PpapiThread::SetupChannel(base::ProcessId renderer_pid,
     return false;
   }
 
-  handle->name = plugin_handle.name;
-#if defined(OS_POSIX)
-  // On POSIX, transfer ownership of the renderer-side (client) FD.
-  // This ensures this process will be notified when it is closed even if a
-  // connection is not established.
-  handle->socket = base::FileDescriptor(dispatcher->TakeRendererFD());
-  if (handle->socket.fd == -1)
-    return false;
-#endif
+  handle->mojo_handle = message_pipe.handle1.release();
 
   // From here, the dispatcher will manage its own lifetime according to the
   // lifetime of the attached channel.