Move ExtensionEventRouter and related into extensions namespace

chrome/browser/extensions/extension_event_router.h

Index: chrome/browser/extensions/extension_event_router.h
diff --git a/chrome/browser/extensions/extension_event_router.h b/chrome/browser/extensions/extension_event_router.h
deleted file mode 100644
index 834d85f258453277ab1d21e5f8df52ca26279398..0000000000000000000000000000000000000000
--- a/chrome/browser/extensions/extension_event_router.h
+++ /dev/null
@@ -1,295 +0,0 @@
-// 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_
-
-#include <map>
-#include <set>
-#include <string>
-
-#include "base/compiler_specific.h"
-#include "base/memory/linked_ptr.h"
-#include "base/memory/ref_counted.h"
-#include "base/values.h"
-#include "chrome/browser/extensions/event_listener_map.h"
-#include "chrome/common/extensions/event_filtering_info.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-#include "ipc/ipc_sender.h"
-
-class GURL;
-class ExtensionHost;
-class ExtensionDevToolsManager;
-class Profile;
-
-namespace content {
-class RenderProcessHost;
-}
-
-namespace extensions {
-class Extension;
-}
-
-struct ExtensionEvent;
-
-using extensions::EventFilteringInfo;
-using extensions::EventListener;
-using extensions::EventListenerMap;
-
-class ExtensionEventRouter : public content::NotificationObserver,
-                             public extensions::EventListenerMap::Delegate {
- 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::Sender* ipc_sender,
-                            const std::string& extension_id,
-                            const std::string& event_name,
-                            const base::Value& event_args,
-                            const GURL& event_url,
-                            UserGestureState user_gesture,
-                            const extensions::EventFilteringInfo& info);
-
-  // This invocation is deprecated. All future consumers of this API should be
-  // sending Values as event arguments, using the above version.
-  static void DispatchEvent(IPC::Sender* ipc_sender,
-                            const std::string& extension_id,
-                            const std::string& event_name,
-                            const std::string& event_args,
-                            const GURL& event_url,
-                            UserGestureState user_gesture,
-                            const extensions::EventFilteringInfo& info);
-
-  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,
-                        const std::string& extension_id);
-  void RemoveEventListener(const std::string& event_name,
-                           content::RenderProcessHost* process,
-                           const std::string& extension_id);
-
-  // Add or remove the extension as having a lazy background page that listens
-  // to the event. The difference from the above methods is that these will be
-  // remembered even after the process goes away. We use this list to decide
-  // which extension pages to load when dispatching an event.
-  void AddLazyEventListener(const std::string& event_name,
-                            const std::string& extension_id);
-  void RemoveLazyEventListener(const std::string& event_name,
-                               const std::string& extension_id);
-
-  // If |add_lazy_listener| is true also add the lazy version of this listener.
-  void AddFilteredEventListener(const std::string& event_name,
-                                content::RenderProcessHost* process,
-                                const std::string& extension_id,
-                                const base::DictionaryValue& filter,
-                                bool add_lazy_listener);
-
-  // If |remove_lazy_listener| is true also remove the lazy version of this
-  // listener.
-  void RemoveFilteredEventListener(const std::string& event_name,
-                                   content::RenderProcessHost* process,
-                                   const std::string& extension_id,
-                                   const base::DictionaryValue& filter,
-                                   bool remove_lazy_listener);
-
-  // Returns true if there is at least one listener for the given event.
-  bool HasEventListener(const std::string& event_name);
-
-  // Returns true if the extension is listening to the given event.
-  bool ExtensionHasEventListener(const std::string& extension_id,
-                                 const std::string& event_name);
-
-  // Send an event to every registered extension renderer. If
-  // |restrict_to_profile| is non-NULL, then the event will not be sent to other
-  // profiles unless the extension has permission (e.g. incognito tab update ->
-  // normal profile only works if extension is allowed incognito access). If
-  // |event_url| is not empty, the event is only sent to extension with host
-  // permissions for this url.
-  void DispatchEventToRenderers(
-      const std::string& event_name,
-      const std::string& event_args,
-      Profile* restrict_to_profile,
-      const GURL& event_url,
-      extensions::EventFilteringInfo info);
-
-  // As above, but defaults |info| to EventFilteringInfo().
-  void DispatchEventToRenderers(
-      const std::string& event_name,
-      const std::string& event_args,
-      Profile* restrict_to_profile,
-      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 base::Value& event_args,
-      Profile* restrict_to_profile,
-      const GURL& event_url);
-
-  // This invocation is deprecated. The above variant which uses a Value for
-  // event_args is to be used instead.
-  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,
-      Profile* restrict_to_profile,
-      const std::string& cross_incognito_args,
-      const GURL& event_url);
-
-  // Record the Event Ack from the renderer. (One less event in-flight.)
-  void OnEventAck(Profile* profile, const std::string& extension_id);
-
- private:
-  // The extension and process that contains the event listener for a given
-  // event.
-  struct ListenerProcess;
-
-  // A map between an event name and a set of extensions that are listening
-  // to that event.
-  typedef std::map<std::string, std::set<ListenerProcess> > ListenerMap;
-
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
-
-  // Returns true if the given listener map contains a event listeners for
-  // the given event. If |extension_id| is non-empty, we also check that that
-  // extension is one of the listeners.
-  bool HasEventListenerImpl(const ListenerMap& listeners,
-                            const std::string& extension_id,
-                            const std::string& event_name);
-
-  // Shared by DispatchEvent*. If |restrict_to_extension_id| is empty, the
-  // event is broadcast.
-  // An event that just came off the pending list may not be delayed again.
-  void DispatchEventImpl(const std::string& restrict_to_extension_id,
-                         const linked_ptr<ExtensionEvent>& event);
-
-  // Ensures that all lazy background pages that are interested in the given
-  // event are loaded, and queues the event if the page is not ready yet.
-  void DispatchLazyEvent(const std::string& extension_id,
-                         const linked_ptr<ExtensionEvent>& event);
-
-  // Dispatches the event to the specified extension running in |process|.
-  void DispatchEventToProcess(const std::string& extension_id,
-                              content::RenderProcessHost* process,
-                              const linked_ptr<ExtensionEvent>& event);
-
-  // Returns false when the event is scoped to a profile and the listening
-  // extension does not have access to events from that profile. Also fills
-  // |event_args| with the proper arguments to send, which may differ if
-  // the event crosses the incognito boundary.
-  bool CanDispatchEventToProfile(
-      Profile* profile,
-      const extensions::Extension* extension,
-      const linked_ptr<ExtensionEvent>& event,
-      const base::Value** event_args);
-
-  // Possibly loads given extension's background page in preparation to
-  // dispatch an event.
-  void MaybeLoadLazyBackgroundPageToDispatchEvent(
-      Profile* profile,
-      const extensions::Extension* extension,
-      const linked_ptr<ExtensionEvent>& event);
-
-  // Track of the number of dispatched events that have not yet sent an
-  // ACK from the renderer.
-  void IncrementInFlightEvents(Profile* profile,
-                               const extensions::Extension* extension);
-
-  void DispatchPendingEvent(const linked_ptr<ExtensionEvent>& event,
-                            ExtensionHost* host);
-
-  // Implementation of extensions::EventListenerMap::Delegate.
-  virtual void OnListenerAdded(const EventListener* listener) OVERRIDE;
-  virtual void OnListenerRemoved(const EventListener* listener) OVERRIDE;
-
-  Profile* profile_;
-
-  content::NotificationRegistrar registrar_;
-
-  scoped_refptr<ExtensionDevToolsManager> extension_devtools_manager_;
-
-  EventListenerMap listeners_;
-
-  DISALLOW_COPY_AND_ASSIGN(ExtensionEventRouter);
-};
-
-struct ExtensionEvent {
-  std::string event_name;
-  scoped_ptr<Value> event_args;
-  GURL event_url;
-  Profile* restrict_to_profile;
-  scoped_ptr<Value> cross_incognito_args;
-  ExtensionEventRouter::UserGestureState user_gesture;
-  extensions::EventFilteringInfo info;
-
-  ExtensionEvent(const std::string& event_name,
-                 const Value& event_args,
-                 const GURL& event_url,
-                 Profile* restrict_to_profile,
-                 const Value& cross_incognito_args,
-                 ExtensionEventRouter::UserGestureState user_gesture,
-                 const extensions::EventFilteringInfo& info);
-
-  // TODO(gdk): This variant should be retired once the callers are switched to
-  // providing Values instead of just strings.
-  ExtensionEvent(const std::string& event_name,
-                 const std::string& event_args,
-                 const GURL& event_url,
-                 Profile* restrict_to_profile,
-                 const std::string& cross_incognito_args,
-                 ExtensionEventRouter::UserGestureState user_gesture,
-                 const extensions::EventFilteringInfo& info);
-
-  ExtensionEvent(const std::string& event_name,
-                 const Value& event_args,
-                 const GURL& event_url,
-                 Profile* restrict_to_profile,
-                 ExtensionEventRouter::UserGestureState user_gesture,
-                 const extensions::EventFilteringInfo& info);
-
-  ~ExtensionEvent();
-};
-
-
-#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_EVENT_ROUTER_H_