Add support for new scroll valuators coming from CMT

ui/views/widget/native_widget_aura.cc

 // Copyright (c) 2011 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 "ui/aura/client/activation_client.h"
 #include "ui/aura/client/aura_constants.h"
@@ skipping 636 matching lines @@
 int NativeWidgetAura::GetNonClientComponent(const gfx::Point& point) const {
   return delegate_->GetNonClientComponent(point);
 }
 
 bool NativeWidgetAura::OnMouseEvent(aura::MouseEvent* event) {
   DCHECK(window_->IsVisible());
   if (event->type() == ui::ET_MOUSEWHEEL) {
     MouseWheelEvent wheel_event(event);
     return delegate_->OnMouseEvent(wheel_event);
   }
+  if (event->type() == ui::ET_SCROLL) {
+    ScrollEvent scroll_event(static_cast<aura::ScrollEvent*>(event));
+    return delegate_->OnMouseEvent(scroll_event);
+  }
   MouseEvent mouse_event(event);
   if (tooltip_manager_.get())
     tooltip_manager_->UpdateTooltip();
   return delegate_->OnMouseEvent(mouse_event);
 }
 
 ui::TouchStatus NativeWidgetAura::OnTouchEvent(aura::TouchEvent* event) {
   DCHECK(window_->IsVisible());
   TouchEvent touch_event(event);
   return delegate_->OnTouchEvent(touch_event);
@@ skipping 184 matching lines @@
   }
 }
 
 // static
 bool NativeWidgetPrivate::IsMouseButtonDown() {
   return aura::RootWindow::GetInstance()->IsMouseButtonDown();
 }
 
 }  // namespace internal
 }  // namespace views