Add EventFilter for LauncherTooltip.

ash/launcher/launcher_tooltip_manager.h

Index: ash/launcher/launcher_tooltip_manager.h
diff --git a/ash/launcher/launcher_tooltip_manager.h b/ash/launcher/launcher_tooltip_manager.h
index b32ec9888ff24020587a0e82fb22b442a18954dd..b2cb8c4c744487408eaa6fd28b978718b83d8d02 100644
--- a/ash/launcher/launcher_tooltip_manager.h
+++ b/ash/launcher/launcher_tooltip_manager.h
@@ -11,6 +11,7 @@
 #include "base/basictypes.h"
 #include "base/string16.h"
 #include "ui/gfx/rect.h"
+#include "ui/aura/event_filter.h"
 #include "ui/views/bubble/bubble_border.h"
 #include "ui/views/bubble/bubble_delegate.h"
 
@@ -30,13 +31,16 @@ class LauncherViewTest;
 }
 
 namespace internal {
+class LauncherView;
 
 // LauncherTooltipManager manages the tooltip balloon poping up on launcher
 // items.
-class ASH_EXPORT LauncherTooltipManager : public ShelfLayoutManager::Observer {
+class ASH_EXPORT LauncherTooltipManager : public aura::EventFilter,
+                                          public ShelfLayoutManager::Observer {
  public:
   LauncherTooltipManager(ShelfAlignment alignment,
-                         ShelfLayoutManager* shelf_layout_manager);
+                         ShelfLayoutManager* shelf_layout_manager,
+                         LauncherView* launcher_view);
   virtual ~LauncherTooltipManager();
 
   // Called when the bubble is closed.
@@ -66,6 +70,17 @@ class ASH_EXPORT LauncherTooltipManager : public ShelfLayoutManager::Observer {
   bool IsVisible();
 
 protected:
+  // aura::EventFilter overrides:
+  virtual bool PreHandleKeyEvent(aura::Window* target,
+                                 aura::KeyEvent* event) OVERRIDE;
+  virtual bool PreHandleMouseEvent(aura::Window* target,
+                                   aura::MouseEvent* event) OVERRIDE;
+  virtual ui::TouchStatus PreHandleTouchEvent(aura::Window* target,
+                                              aura::TouchEvent* event) OVERRIDE;
+  virtual ui::GestureStatus PreHandleGestureEvent(
+      aura::Window* target,
+      aura::GestureEvent* event) OVERRIDE;
+
   // ShelfLayoutManager::Observer overrides:
   virtual void WillDeleteShelf() OVERRIDE;
   virtual void WillChangeVisibilityState(
@@ -82,12 +97,14 @@ protected:
   void CreateBubble(views::View* anchor, const string16& text);
 
   LauncherTooltipBubble* view_;
+  views::Widget* widget_;
   views::View* anchor_;
   string16 text_;
   ShelfAlignment alignment_;
   scoped_ptr<base::Timer> timer_;
 
   ShelfLayoutManager* shelf_layout_manager_;
+  LauncherView* launcher_view_;
 
   DISALLOW_COPY_AND_ASSIGN(LauncherTooltipManager);
 };