Move process-per-site logic from BrowsingInstance to RenderProcessHost.

content/browser/renderer_host/render_process_host_impl.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_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_
 #pragma once
 
 #include <map>
 #include <queue>
@@ skipping 114 matching lines @@
   // list.
   static void RegisterHost(int host_id, RenderProcessHost* host);
   static void UnregisterHost(int host_id);
 
   // Returns true if the given host is suitable for launching a new view
   // associated with the given browser context.
   static bool IsSuitableHost(RenderProcessHost* host,
                              BrowserContext* browser_context,
                              const GURL& site_url);
 
+  // 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(BrowserContext* browser_context,
+                                      const GURL& url);
+
+  // Returns an existing RenderProcessHost for |url| in |browser_context|,
+  // if one exists.  Otherwise a new RenderProcessHost should be created and
+  // registered using RegisterProcessHostForSite().
+  // This should only be used for process-per-site mode, which can be enabled
+  // globally with a command line flag or per-site, as determined by
+  // SiteInstanceImpl::ShouldUseProcessPerSite.
+  static RenderProcessHost* GetProcessHostForSite(
+      BrowserContext* browser_context,
+      const GURL& url);
+
+  // Registers the given |process| to be used for any instance of |url|
+  // within |browser_context|.
+  // This should only be used for process-per-site mode, which can be enabled
+  // globally with a command line flag or per-site, as determined by
+  // SiteInstanceImpl::ShouldUseProcessPerSite.
+  static void RegisterProcessHostForSite(
+      BrowserContext* browser_context,
+      RenderProcessHost* process,
+      const GURL& url);
+
  protected:
   // A proxy for our IPC::Channel that lives on the IO thread (see
   // browser_process.h)
   scoped_ptr<IPC::ChannelProxy> channel_;
 
   // The registered render widget hosts. When this list is empty or all NULL,
   // we should delete ourselves
   IDMap<RenderWidgetHost> render_widget_hosts_;
 
   // True if fast shutdown has been performed on this RPH.
@@ skipping 125 matching lines @@
   // Indicates whether this is a RenderProcessHost of a Browser Plugin guest
   // renderer.
   bool is_guest_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderProcessHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_