Fix RPHI message queueing during process death

content/public/browser/render_process_host.h

Index: content/public/browser/render_process_host.h
diff --git a/content/public/browser/render_process_host.h b/content/public/browser/render_process_host.h
index ef58b64c9736c2da687203e7fae275b0dc197d8a..b2b7df69039177c494fc9f48df07cbd05bc2cf46 100644
--- a/content/public/browser/render_process_host.h
+++ b/content/public/browser/render_process_host.h
@@ -85,6 +85,12 @@ class CONTENT_EXPORT RenderProcessHost : public IPC::Sender,
   // the process has been created, it should just call Init().
   virtual bool Init() = 0;
 
+  // Ensures that a Channel exists and is at least queueing outgoing messages
+  // if there isn't a render process connected to it yet. This may be used to
+  // ensure that in the event of a renderer crash and restart, subsequent
+  // messages sent via Send() will eventually reach the new process.
+  virtual void EnableSendQueue() = 0;
+
   // Gets the next available routing id.
   virtual int GetNextRoutingID() = 0;