Fix RPHI message queueing during process death

content/browser/renderer_host/render_process_host_impl.h

Index: content/browser/renderer_host/render_process_host_impl.h
diff --git a/content/browser/renderer_host/render_process_host_impl.h b/content/browser/renderer_host/render_process_host_impl.h
index ba51fd7d09aeea1583c52908a4f4d26b1b95e380..4e93a91617f087f6c85e9db848e6f3d8c86d16eb 100644
--- a/content/browser/renderer_host/render_process_host_impl.h
+++ b/content/browser/renderer_host/render_process_host_impl.h
@@ -116,6 +116,7 @@ class CONTENT_EXPORT RenderProcessHostImpl
 
   // RenderProcessHost implementation (public portion).
   bool Init() override;
+  void EnableSendQueue() override;
   int GetNextRoutingID() override;
   void AddRoute(int32_t routing_id, IPC::Listener* listener) override;
   void RemoveRoute(int32_t routing_id) override;
@@ -310,6 +311,10 @@ class CONTENT_EXPORT RenderProcessHostImpl
   // to the next child process launched for this host, if any.
   void InitializeChannelProxy();
 
+  // Resets |channel_|, removing it from the attachment broker if necessary.
+  // Always call this in lieu of directly resetting |channel_|.
+  void ResetChannelProxy();
+
   // Creates and adds the IO thread message filters.
   void CreateMessageFilters();