Make sure that a given app/extension requests only its own resources.

chrome/browser/extensions/api/api_resource_event_notifier.h

Index: chrome/browser/extensions/api/api_resource_event_notifier.h
diff --git a/chrome/browser/extensions/api/api_resource_event_notifier.h b/chrome/browser/extensions/api/api_resource_event_notifier.h
index f9876632e68b683fc4e6427bac4a9d7d11026949..1a98a4afa1f8fd944a7c32444901201921d6da64 100644
--- a/chrome/browser/extensions/api/api_resource_event_notifier.h
+++ b/chrome/browser/extensions/api/api_resource_event_notifier.h
@@ -33,8 +33,7 @@ extern const char kSrcIdKey[];
 class ApiResourceEventNotifier
     : public base::RefCountedThreadSafe<ApiResourceEventNotifier> {
  public:
-  ApiResourceEventNotifier(EventRouter* router,
-                           Profile* profile,
+  ApiResourceEventNotifier(EventRouter* router, Profile* profile,
                            const std::string& src_extension_id, int src_id,
                            const GURL& src_url);
 
@@ -45,6 +44,8 @@ class ApiResourceEventNotifier
   static std::string ApiResourceEventTypeToString(
       ApiResourceEventType event_type);
 
+  const std::string& src_extension_id() const { return src_extension_id_; }
+
  private:
   friend class base::RefCountedThreadSafe<ApiResourceEventNotifier>;
   friend class MockApiResourceEventNotifier;