Don't share renderers between unrelated tabs on Android.

content/public/browser/render_process_host.h

 // Copyright (c) 2012 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_PUBLIC_BROWSER_RENDER_PROCESS_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_PROCESS_HOST_H_
 
 #include "base/basictypes.h"
 #include "base/id_map.h"
 #include "base/process/kill.h"
@@ skipping 268 matching lines @@
   static RenderProcessHost* GetExistingProcessHost(
       content::BrowserContext* browser_context, const GURL& site_url);
 
   // Overrides the default heuristic for limiting the max renderer process
   // count.  This is useful for unit testing process limit behaviors.  It is
   // also used to allow a command line parameter to configure the max number of
   // renderer processes and should only be called once during startup.
   // A value of zero means to use the default heuristic.
   static void SetMaxRendererProcessCount(size_t count);
 
-  // Returns the current max number of renderer processes used by the content
-  // module.
+  // Returns the current maximum number of renderer process hosts kept by the
+  // content module or 0 if don't maintain such limit (e.g. on Android).
   static size_t GetMaxRendererProcessCount();
 };
 
 }  // namespace content.
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_PROCESS_HOST_H_