mash: make Env::last_mouse_location() accurate for Mus

ui/aura/window_event_dispatcher.h

 // Copyright 2014 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 UI_AURA_WINDOW_EVENT_DISPATCHER_H_
 #define UI_AURA_WINDOW_EVENT_DISPATCHER_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 17 matching lines @@
 #include "ui/gfx/native_widget_types.h"
 
 namespace ui {
 class GestureEvent;
 class GestureRecognizer;
 class MouseEvent;
 class TouchEvent;
 }
 
 namespace aura {
+class MusMouseLocationUpdater;
 class TestScreen;
 class EnvInputStateController;
 class WindowTreeHost;
 
 namespace test {
 class WindowEventDispatcherTestApi;
 }
 
 // WindowEventDispatcher orchestrates event dispatch within a window tree
 // owned by WindowTreeHost. WTH also owns the WED.
@@ skipping 119 matching lines @@
 
   // Overridden from aura::client::CaptureDelegate:
   void UpdateCapture(Window* old_capture, Window* new_capture) override;
   void OnOtherRootGotCapture() override;
   void SetNativeCapture() override;
   void ReleaseNativeCapture() override;
 
   // Overridden from ui::EventProcessor:
   ui::EventTarget* GetRootTarget() override;
   void OnEventProcessingStarted(ui::Event* event) override;
+  void OnEventProcessingFinished(ui::Event* event) override;
 
   // Overridden from ui::EventDispatcherDelegate.
   bool CanDispatchToTarget(ui::EventTarget* target) override;
   ui::EventDispatchDetails PreDispatchEvent(ui::EventTarget* target,
                                             ui::Event* event) override;
   ui::EventDispatchDetails PostDispatchEvent(ui::EventTarget* target,
                                              const ui::Event& event) override;
 
   // Overridden from ui::GestureEventHelper.
   bool CanDispatchToConsumer(ui::GestureConsumer* consumer) override;
@@ skipping 64 matching lines @@
   // Allowing for reposting of events. Used when exiting context menus.
   std::unique_ptr<ui::LocatedEvent> held_repostable_event_;
 
   // Set when dispatching a held event.
   ui::LocatedEvent* dispatching_held_event_;
 
   ScopedObserver<aura::Window, aura::WindowObserver> observer_manager_;
 
   std::unique_ptr<EnvInputStateController> env_controller_;
 
+  std::unique_ptr<MusMouseLocationUpdater> mus_mouse_location_updater_;
+
   // Used to schedule reposting an event.
   base::WeakPtrFactory<WindowEventDispatcher> repost_event_factory_;
 
   // Used to schedule DispatchHeldEvents() when |move_hold_count_| goes to 0.
   base::WeakPtrFactory<WindowEventDispatcher> held_event_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowEventDispatcher);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_EVENT_DISPATCHER_H_