Enable ChannelMojo for non-renderer child processes

content/public/common/child_process_host_delegate.h

Index: content/public/common/child_process_host_delegate.h
diff --git a/content/public/common/child_process_host_delegate.h b/content/public/common/child_process_host_delegate.h
index 95942763c1575dce8df48cfedce8ef2445b4efdb..7ad73b4fe22d4e79fa2b92109b70ae34ec806599 100644
--- a/content/public/common/child_process_host_delegate.h
+++ b/content/public/common/child_process_host_delegate.h
@@ -24,6 +24,10 @@ class ChildProcessHostDelegate : public IPC::Listener {
   // it's ok to shutdown, when really it's not.
   CONTENT_EXPORT virtual bool CanShutdown();
 
+  // Returns true if the IPC::ChannelMojo should be used to the underlying
+  // channel. This must match with what peer ChildThread says.
+  CONTENT_EXPORT virtual bool ShouldUseMojoChannel();
+
   // Called when the child process unexpected closes the IPC channel. Delegates
   // would normally delete the object in this case.
   virtual void OnChildDisconnected() {}