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 34 matching lines @@
 // This object communicates back and forth with the RenderProcess object
 // running in the renderer process. Each RenderProcessHost and RenderProcess
 // keeps a list of RenderView (renderer) and WebContentsImpl (browser) which
 // are correlated with IDs. This way, the Views and the corresponding ViewHosts
 // communicate through the two process objects.
 class CONTENT_EXPORT RenderProcessHostImpl
     : public RenderProcessHost,
       public ChildProcessLauncher::Client,
       public base::WaitableEventWatcher::Delegate {
  public:
+  // Map of site to process, to ensure we only have one RenderProcessHost per
+  // site in process-per-site mode.
+  typedef base::hash_map<std::string, RenderProcessHost*> SiteProcessMap;
+
+  // Map of BrowserContext to SiteProcessMap, for use in process-per-site mode.
+  typedef base::hash_map<content::BrowserContext*, SiteProcessMap>
+      ContextSiteProcessMap;
+
   RenderProcessHostImpl(BrowserContext* browser_context, bool is_guest);
   virtual ~RenderProcessHostImpl();
 
   // RenderProcessHost implementation (public portion).
   virtual void EnableSendQueue() OVERRIDE;
   virtual bool Init() OVERRIDE;
   virtual int GetNextRoutingID() OVERRIDE;
   virtual void CancelResourceRequests(int render_widget_id) OVERRIDE;
   virtual void CrossSiteSwapOutACK(const ViewMsg_SwapOut_Params& params)
       OVERRIDE;
@@ skipping 52 matching lines @@
     child_process_activity_time_ = base::TimeTicks::Now();
   }
 
   // Returns the current number of active views in this process.  Excludes
   // any RenderViewHosts that are swapped out.
   int GetActiveViewCount();
 
   // Register/unregister the host identified by the host id in the global host
   // list.
   static void RegisterHost(int host_id, RenderProcessHost* host);
-  static void UnregisterHost(int host_id);
+  static void UnregisterHost(int host_id, RenderProcessHost* host);

[jam, 2012/06/28 00:12:52]

no need to pass |host| since it can be retrieved from the map?

[Charlie Reis, 2012/06/28 00:49:15]

Good call.  Done.

 
   // 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);
 
  protected:
   // A proxy for our IPC::Channel that lives on the IO thread (see
   // browser_process.h)
@@ skipping 132 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_