Changed the extension.connect() API not to broadcast to all tabs. Added a

chrome/browser/extensions/extension_process_manager.h

 // Copyright (c) 2009 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 CHROME_BROWSER_EXTENSIONS_EXTENSION_PROCESS_MANAGER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_PROCESS_MANAGER_H_
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/ref_counted.h"
 #include "chrome/common/notification_registrar.h"
 
 class Browser;
 class BrowsingInstance;
 class Extension;
 class ExtensionHost;
 #if defined(TOOLKIT_VIEWS)
 class ExtensionView;
 #endif
 class GURL;
 class Profile;
+class RenderProcessHost;
 class SiteInstance;
 
 // Manages dynamic state of running Chromium extensions.  There is one instance
 // of this class per Profile (including OTR).
 class ExtensionProcessManager : public NotificationObserver {
  public:
   explicit ExtensionProcessManager(Profile* profile);
   ~ExtensionProcessManager();
 
   // Creates a new ExtensionHost with its associated view, grouping it in the
   // appropriate SiteInstance (and therefore process) based on the URL and
   // profile.
   ExtensionHost* CreateView(Extension* extension,
                             const GURL& url,
                             Browser* browser);
   ExtensionHost* CreateView(const GURL& url, Browser* browser);
 
   // Creates a new UI-less extension instance.  Like CreateView, but not
   // displayed anywhere.
   ExtensionHost* CreateBackgroundHost(Extension* extension, const GURL& url);
 
   // Returns the SiteInstance that the given URL belongs to.
   SiteInstance* GetSiteInstanceForURL(const GURL& url);
 
-  // Register an extension process by |extension_id| and specifying which
+  // Registers an extension process by |extension_id| and specifying which
   // |process_id| it belongs to.
-  void RegisterExtensionProcess(std::string extension_id, int process_id);
+  void RegisterExtensionProcess(const std::string& extension_id,
+                                int process_id);
 
-  // Unregister an extension process with specified |process_id|.
+  // Unregisters an extension process with specified |process_id|.
   void UnregisterExtensionProcess(int process_id);
 
+  // Returns the process that the extension with the given ID is running in.
+  RenderProcessHost* GetExtensionProcess(const std::string& extension_id);
+
   // NotificationObserver:
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
   typedef std::set<ExtensionHost*> ExtensionHostSet;
   typedef ExtensionHostSet::const_iterator const_iterator;
   const_iterator begin() const { return all_hosts_.begin(); }
   const_iterator end() const { return all_hosts_.end(); }
 
@@ skipping 14 matching lines @@
   scoped_refptr<BrowsingInstance> browsing_instance_;
 
   // A map of extension ID to the render_process_id that the extension lives in.
   typedef std::map<std::string, int> ProcessIDMap;
   ProcessIDMap process_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionProcessManager);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PROCESS_MANAGER_H_