Update extension events, routing, and delivery to use user gesture.

chrome/browser/extensions/extension_event_router.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 CHROME_BROWSER_EXTENSIONS_EXTENSION_EVENT_ROUTER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_EVENT_ROUTER_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 10 matching lines @@
 class Extension;
 class ExtensionDevToolsManager;
 class Profile;
 
 namespace content {
 class RenderProcessHost;
 }
 
 class ExtensionEventRouter : public content::NotificationObserver {
  public:
+  // These constants convey the state of our knowledge of whether we're in
+  // a user-caused gesture as part of DispatchEvent.
+  enum UserGestureState {
+    USER_GESTURE_UNKNOWN = 0,
+    USER_GESTURE_ENABLED = 1,
+    USER_GESTURE_NOT_ENABLED = 2,
+  };
+
   // Sends an event via ipc_sender to the given extension. Can be called on
   // any thread.
   static void DispatchEvent(IPC::Message::Sender* ipc_sender,
                             const std::string& extension_id,
                             const std::string& event_name,
                             const std::string& event_args,
-                            const GURL& event_url);
+                            const GURL& event_url,
+                            UserGestureState user_gesture);
 
   explicit ExtensionEventRouter(Profile* profile);
   virtual ~ExtensionEventRouter();
 
   // Add or remove the process/extension pair as a listener for |event_name|.
   // Note that multiple extensions can share a process due to process
   // collapsing. Also, a single extension can have 2 processes if it is a split
   // mode extension.
   void AddEventListener(const std::string& event_name,
                         content::RenderProcessHost* process,
@@ skipping 31 matching lines @@
       const GURL& event_url);
 
   // Same as above, except only send the event to the given extension.
   virtual void DispatchEventToExtension(
       const std::string& extension_id,
       const std::string& event_name,
       const std::string& event_args,
       Profile* restrict_to_profile,
       const GURL& event_url);
 
+  // Dispatch an event to particular extension. Also include an
+  // explicit user gesture indicator.
+  virtual void DispatchEventToExtension(
+      const std::string& extension_id,
+      const std::string& event_name,
+      const std::string& event_args,
+      Profile* restrict_to_profile,
+      const GURL& event_url,
+      UserGestureState user_gesture);
+
   // Send different versions of an event to extensions in different profiles.
   // This is used in the case of sending one event to extensions that have
   // incognito access, and another event to extensions that don't (here),
   // in order to avoid sending 2 events to "spanning" extensions.
   // If |cross_incognito_profile| is non-NULL and different from
   // restrict_to_profile, send the event with cross_incognito_args to the
   // extensions in that profile that can't cross incognito.
   void DispatchEventsToRenderersAcrossIncognito(
       const std::string& event_name,
       const std::string& event_args,
@@ skipping 74 matching lines @@
   PendingEventsPerExtMap pending_events_;
 
   // Track of the number of dispatched events that have not yet sent an
   // ACK from the renderer.
   void IncrementInFlightEvents(const Extension* extension);
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionEventRouter);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_EVENT_ROUTER_H_