Adding a command line flag to specify renderer process limit

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 207 matching lines @@
   // 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.
+  // count.  This is useful for unit testing process limit behaviors and it is
+  // used to allow command line parameter to configure the max number of
+  // renderer processes.

[Charlie Reis, 2012/02/03 23:05:34]

We should either guarantee that it's only called at startup, or add a comment
here saying that.  We don't expect it to change at runtime.

[nasko, 2012/02/07 00:42:05]

Done.

   // A value of zero means to use the default heuristic.
-  static void SetMaxRendererProcessCountForTest(size_t count);
+  static void SetMaxRendererProcessCount(size_t count);
+
+  // Returns the current max number of renderer processes used by the browser.
+  static size_t GetMaxRendererProcessCount();

[Charlie Reis, 2012/02/03 23:05:34]

This isn't strictly needed here, but I know we'll need it in your next CL, so I
think it's fine to add it now.

[nasko, 2012/02/07 00:42:05]

Done.

 };
 
 }  // namespace content.
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_PROCESS_HOST_H_