Fix a regression where extension APIs would sometimes not be available on the

content/browser/renderer_host/render_process_host.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_H_
 #pragma once
 
 #include <set>
 
@@ skipping 144 matching lines @@
   // only if |count| matches the number of render widgets that this process
   // controls.
   bool FastShutdownForPageCount(size_t count);
 
   bool fast_shutdown_started() {
     return fast_shutdown_started_;
   }
 
   // Virtual interface ---------------------------------------------------------
 
+  // Old RenderProcessHosts can be reused. Call this before Init to reset the
+  // instance to the state it was before being used. Has no effect if called on
+  // a fresh RenderProcessHost.
+  virtual void PrepareForReuse() = 0;

[Charlie Reis, 2011/06/22 00:52:31]

Since we always call this (even on the first use), should we call it something
like PrepareForUse()?

[Matt Perry, 2011/06/22 21:14:12]

I renamed to EnableSendQueue to reflect what it actually does.

+
   // Initialize the new renderer process, returning true on success. This must
   // be called once before the object can be used, but can be called after
   // that with no effect. Therefore, if the caller isn't sure about whether
   // the process has been created, it should just call Init().
   virtual bool Init(bool is_accessibility_enabled) = 0;
 
   // Gets the next available routing id.
   virtual int GetNextRoutingID() = 0;
 
   // Called on the UI thread to cancel any outstanding resource requests for
@@ skipping 146 matching lines @@
 // Factory object for RenderProcessHosts. Using this factory allows tests to
 // swap out a different one to use a TestRenderProcessHost.
 class RenderProcessHostFactory {
  public:
   virtual ~RenderProcessHostFactory() {}
   virtual RenderProcessHost* CreateRenderProcessHost(
       Profile* profile) const = 0;
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_H_