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

content/renderer/pepper/host_dispatcher_wrapper.cc

Index: content/renderer/pepper/host_dispatcher_wrapper.cc
diff --git a/content/renderer/pepper/host_dispatcher_wrapper.cc b/content/renderer/pepper/host_dispatcher_wrapper.cc
index 88d567a5cdb77d89db20998549ce965ca0e6c96b..348f95200445fdb58e8aae5749de84eb351c7ad4 100644
--- a/content/renderer/pepper/host_dispatcher_wrapper.cc
+++ b/content/renderer/pepper/host_dispatcher_wrapper.cc
@@ -37,15 +37,9 @@ bool HostDispatcherWrapper::Init(const IPC::ChannelHandle& channel_handle,
                                  PP_GetInterface_Func local_get_interface,
                                  const ppapi::Preferences& preferences,
                                  scoped_refptr<PepperHungPluginFilter> filter) {
-  if (channel_handle.name.empty())
+  if (!channel_handle.mojo_handle.is_valid())
     return false;
 
-#if defined(OS_POSIX)
-  DCHECK_NE(-1, channel_handle.socket.fd);
-  if (channel_handle.socket.fd == -1)
-    return false;
-#endif
-
   dispatcher_delegate_.reset(new PepperProxyChannelDelegateImpl);
   dispatcher_.reset(new ppapi::proxy::HostDispatcher(
       module_->pp_module(), local_get_interface, permissions_));