events: Get rid of GestureStatus in favour of EventResult.

ash/drag_drop/drag_drop_controller.cc

 // 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.
 
 #include "ash/drag_drop/drag_drop_controller.h"
 
 #include "ash/drag_drop/drag_drop_tracker.h"
 #include "ash/drag_drop/drag_image_view.h"
 #include "ash/shell.h"
 #include "ash/wm/coordinate_conversion.h"
@@ skipping 243 matching lines @@
       break;
     case ui::ET_TOUCH_CANCELLED:
       DragCancel();
       break;
     default:
       return ui::TOUCH_STATUS_UNKNOWN;
   }
   return ui::TOUCH_STATUS_CONTINUE;
 }
 
-ui::GestureStatus DragDropController::PreHandleGestureEvent(
+ui::EventResult DragDropController::PreHandleGestureEvent(
     aura::Window* target,
     ui::GestureEvent* event) {
-  return ui::GESTURE_STATUS_UNKNOWN;
+  return ui::ER_UNHANDLED;
 }
 
 void DragDropController::OnWindowDestroyed(aura::Window* window) {
   if (drag_window_ == window) {
     drag_window_->RemoveObserver(this);
     drag_window_ = NULL;
   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ skipping 28 matching lines @@
     drag_window_->RemoveObserver(this);
   drag_window_ = NULL;
   drag_data_ = NULL;
   // Cleanup can be called again while deleting DragDropTracker, so use Pass
   // instead of reset to avoid double free.
   drag_drop_tracker_.Pass();
 }
 
 }  // namespace internal
 }  // namespace ash