Remove unnecessary spin in ToolTipController

ui/views/corewm/tooltip_controller.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 UI_VIEWS_COREWM_TOOLTIP_CONTROLLER_H_
 #define UI_VIEWS_COREWM_TOOLTIP_CONTROLLER_H_
 
 #include <map>
 #include <memory>
 
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "base/timer/timer.h"
+#include "ui/aura/client/cursor_client_observer.h"
 #include "ui/aura/window_observer.h"
 #include "ui/events/event_handler.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/views/views_export.h"
 #include "ui/wm/public/tooltip_client.h"
 
 namespace aura {
 class Window;
 }
 
 namespace views {
 namespace corewm {
 
 class Tooltip;
 
 namespace test {
 class TooltipControllerTestHelper;
 }  // namespace test
 
 // TooltipController provides tooltip functionality for aura.
-class VIEWS_EXPORT TooltipController : public aura::client::TooltipClient,
-                                       public ui::EventHandler,
-                                       public aura::WindowObserver {
+class VIEWS_EXPORT TooltipController
+    : public aura::client::TooltipClient,
+      public ui::EventHandler,
+      public aura::client::CursorClientObserver,
+      public aura::WindowObserver {
  public:
   explicit TooltipController(std::unique_ptr<Tooltip> tooltip);
   ~TooltipController() override;
 
   // Overridden from aura::client::TooltipClient.
   int GetMaxWidth(const gfx::Point& location) const override;
   void UpdateTooltip(aura::Window* target) override;
   void SetTooltipShownTimeout(aura::Window* target, int timeout_in_ms) override;
   void SetTooltipsEnabled(bool enable) override;
 
   // Overridden from ui::EventHandler.
   void OnKeyEvent(ui::KeyEvent* event) override;
   void OnMouseEvent(ui::MouseEvent* event) override;
   void OnTouchEvent(ui::TouchEvent* event) override;
   void OnCancelMode(ui::CancelModeEvent* event) override;
 
+  // Overridden from aura::client::CursorClientObserver.
+  void OnCursorVisibilityChanged(bool is_visible) override;
+
   // Overridden from aura::WindowObserver.
   void OnWindowDestroyed(aura::Window* window) override;
+  void OnWindowPropertyChanged(aura::Window* window,
+                               const void* key,
+                               intptr_t old) override;
 
   const gfx::Point& mouse_location() const { return curr_mouse_loc_; }
 
  private:
   friend class test::TooltipControllerTestHelper;
 
-  void TooltipTimerFired();
   void TooltipShownTimerFired();
 
   // Updates the tooltip if required (if there is any change in the tooltip
   // text, tooltip id or the aura::Window).
   void UpdateIfRequired();
 
   // Only used in tests.
   bool IsTooltipVisible();
 
   bool IsDragDropInProgress();
@@ skipping 11 matching lines @@
   aura::Window* tooltip_window_;
   base::string16 tooltip_text_;
   const void* tooltip_id_;
 
   // These fields are for tracking state when the user presses a mouse button.
   aura::Window* tooltip_window_at_mouse_press_;
   base::string16 tooltip_text_at_mouse_press_;
 
   std::unique_ptr<Tooltip> tooltip_;
 
-  base::RepeatingTimer tooltip_timer_;
-
   // Timer to timeout the life of an on-screen tooltip. We hide the tooltip when
   // this timer fires.
   base::OneShotTimer tooltip_shown_timer_;
 
   // Location of the last event in |tooltip_window_|'s coordinates.
   gfx::Point curr_mouse_loc_;
 
   bool tooltips_enabled_;
 
   std::map<aura::Window*, int> tooltip_shown_timeout_map_;
 
   DISALLOW_COPY_AND_ASSIGN(TooltipController);
 };
 
 }  // namespace corewm
 }  // namespace views
 
 #endif  // UI_VIEWS_COREWM_TOOLTIP_CONTROLLER_H_