Track all extension processes in ExtensionInfoMap

chrome/browser/extensions/extension_process_manager.h

 // Copyright (c) 2011 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_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 129 matching lines @@
 
   // The BrowsingInstance shared by all extensions in this profile.  This
   // controls process grouping.
   scoped_refptr<BrowsingInstance> browsing_instance_;
 
   // A map of site instance ID to the ID of the extension it hosts.
   typedef std::map<int, std::string> SiteInstanceIDMap;
   SiteInstanceIDMap extension_ids_;
 
   // A map of process ID to site instance ID of the site instances it hosts.
-  typedef std::map<int, std::set<int> > ProcessIDMap;
+  typedef std::set<int> SiteInstanceIDSet;
+  typedef std::map<int, SiteInstanceIDSet> ProcessIDMap;
   ProcessIDMap process_ids_;
 
  private:
   // Registers a site instance as hosting a given extension.
   void RegisterExtensionSiteInstance(SiteInstance* site_instance,
                                      const Extension* extension);
 
   // Unregisters the extension associated with |site_instance|.
   void UnregisterExtensionSiteInstance(SiteInstance* site_instance);
 
   // Contains all extension-related RenderViewHost instances for all extensions.
   typedef std::set<RenderViewHost*> RenderViewHostSet;
   RenderViewHostSet all_extension_views_;
 
  private:
   // Close the given |host| iff it's a background page.
   void CloseBackgroundHost(ExtensionHost* host);
 
   // Excludes background page.
   bool HasVisibleViews(const std::string& extension_id);
 
+  // Clears the mapping for the specified site instance. Returns the process the
+  // site was mapped to, or -1 if it wasn't found.
+  int ClearSiteInstanceID(int site_instance_id);
+
   DISALLOW_COPY_AND_ASSIGN(ExtensionProcessManager);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PROCESS_MANAGER_H_