Enable ChannelMojo for non-renderer child processes

content/public/browser/browser_child_process_host_delegate.h

Index: content/public/browser/browser_child_process_host_delegate.h
diff --git a/content/public/browser/browser_child_process_host_delegate.h b/content/public/browser/browser_child_process_host_delegate.h
index b6568af1f20d8763ce0c1ec035cc43085d544c3b..c6a94460aba8b8688ffbe2b2e30428f70b458495 100644
--- a/content/public/browser/browser_child_process_host_delegate.h
+++ b/content/public/browser/browser_child_process_host_delegate.h
@@ -21,6 +21,10 @@ class CONTENT_EXPORT BrowserChildProcessHostDelegate : public IPC::Listener {
   // it's ok to shutdown, when really it's not.
   virtual bool CanShutdown();
 
+  // Returns true if the IPC::ChannelMojo should be used to the underlying
+  // channel. This must match with what peer ChildThread says.
+  virtual bool ShouldUseMojoChannel();
+
   // Called when the process has been started.
   virtual void OnProcessLaunched() {}