Clean up some detritus that accumulated during the fixing of 125937.

ui/views/widget/native_widget_aura.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 "ui/views/widget/native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/string_util.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/client/activation_change_observer.h"
@@ skipping 774 matching lines @@
       if (root_layer_iter > child_layer_iter)
         return false;
     }
   }
   return true;
 }
 
 bool NativeWidgetAura::OnMouseEvent(ui::MouseEvent* event) {
   DCHECK(window_->IsVisible());
   if (event->type() == ui::ET_MOUSEWHEEL) {
-    ui::MouseWheelEvent wheel_event(event);
-    return delegate_->OnMouseEvent(wheel_event);
+    ui::MouseWheelEvent mwe(*event);
+    return delegate_->OnMouseEvent(mwe);
   }
+
   if (event->type() == ui::ET_SCROLL) {
     if (delegate_->OnMouseEvent(*event))
       return true;
 
     // Convert unprocessed scroll events into wheel events.
-    ui::MouseWheelEvent wheel_event(*static_cast<ui::ScrollEvent*>(event));
-    return delegate_->OnMouseEvent(wheel_event);
+    ui::MouseWheelEvent mwe(*static_cast<ui::ScrollEvent*>(event));
+    return delegate_->OnMouseEvent(mwe);
   }
   if (tooltip_manager_.get())
     tooltip_manager_->UpdateTooltip();
   return delegate_->OnMouseEvent(*event);
 }
 
 ui::TouchStatus NativeWidgetAura::OnTouchEvent(ui::TouchEvent* event) {
   DCHECK(window_->IsVisible());
   return delegate_->OnTouchEvent(*event);
 }
@@ skipping 228 matching lines @@
   return aura::Env::GetInstance()->is_mouse_button_down();
 }
 
 // static
 bool NativeWidgetPrivate::IsTouchDown() {
   return aura::Env::GetInstance()->is_touch_down();
 }
 
 }  // namespace internal
 }  // namespace views