Add UMA stats for predicted process counts with out-of-process iframes.

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.h"
@@ skipping 214 matching lines @@
   static void SetRunRendererInProcess(bool value);
 
   // Allows iteration over all the RenderProcessHosts in the browser. Note
   // that each host may not be active, and therefore may have NULL channels.
   static iterator AllHostsIterator();
 
   // Returns the RenderProcessHost given its ID.  Returns NULL if the ID does
   // not correspond to a live RenderProcessHost.
   static RenderProcessHost* FromID(int render_process_id);
 
+  // Returns whether the process-per-site model is in use (globally or just for
+  // the current site), in which case we should ensure there is only one
+  // RenderProcessHost per site for the entire browser context.
+  static bool ShouldUseProcessPerSite(content::BrowserContext* browser_context,
+                                      const GURL& url);
+
   // Returns true if the caller should attempt to use an existing
   // RenderProcessHost rather than creating a new one.
   static bool ShouldTryToUseExistingProcessHost(
       content::BrowserContext* browser_context, const GURL& site_url);
 
   // Get an existing RenderProcessHost associated with the given browser
   // context, if possible.  The renderer process is chosen randomly from
   // suitable renderers that share the same context and type (determined by the
   // site url).
   // Returns NULL if no suitable renderer process is available, in which case
   // the caller is free to create a new renderer.
   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.
   static size_t GetMaxRendererProcessCount();
 };
 
 }  // namespace content.
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_PROCESS_HOST_H_