Track all extension processes in ExtensionInfoMap

chrome/browser/extensions/extension_process_manager.h

Index: chrome/browser/extensions/extension_process_manager.h
diff --git a/chrome/browser/extensions/extension_process_manager.h b/chrome/browser/extensions/extension_process_manager.h
index 41d0bbb0987223a13c598fcfa2e1bd2b60b11f4f..e0f1554cce40eed2e2f29903137b04eaea80f21a 100644
--- a/chrome/browser/extensions/extension_process_manager.h
+++ b/chrome/browser/extensions/extension_process_manager.h
@@ -147,7 +147,8 @@ class ExtensionProcessManager : public content::NotificationObserver {
   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:
@@ -169,6 +170,8 @@ class ExtensionProcessManager : public content::NotificationObserver {
   // Excludes background page.
   bool HasVisibleViews(const std::string& extension_id);
 
+  int GetProcessIDBySiteInstanceID(int site_instance_id) const;
+
   DISALLOW_COPY_AND_ASSIGN(ExtensionProcessManager);
 };