Add support for new scroll valuators coming from CMT

ui/aura/root_window.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/aura/root_window.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 178 matching lines @@
 }
 
 bool RootWindow::DispatchKeyEvent(KeyEvent* event) {
   if (focused_window_) {
     KeyEvent translated_event(*event);
     return ProcessKeyEvent(focused_window_, &translated_event);
   }
   return false;
 }
 
+bool RootWindow::DispatchScrollEvent(ScrollEvent* event) {
+  event->UpdateForTransform(layer()->transform());
+
+  last_mouse_location_ = event->location();
+
+  Window* target =
+      mouse_pressed_handler_ ? mouse_pressed_handler_ : capture_window_;
+  if (!target)
+    target = GetEventHandlerForPoint(event->location());
+
+  if (target && target->delegate()) {
+    int flags = event->flags();
+    gfx::Point location_in_window = event->location();
+    Window::ConvertPointToWindow(this, target, &location_in_window);
+    if (IsNonClientLocation(target, location_in_window))
+      flags |= ui::EF_IS_NON_CLIENT;
+    ScrollEvent translated_event(*event, this, target, event->type(), flags);
+    return ProcessMouseEvent(target, &translated_event);
+  }
+  return false;
+}
+
 bool RootWindow::DispatchTouchEvent(TouchEvent* event) {
   event->UpdateForTransform(layer()->transform());
   bool handled = false;
   Window* target =
       touch_event_handler_ ? touch_event_handler_ : capture_window_;
   if (!target)
     target = GetEventHandlerForPoint(event->location());
   if (target) {
     TouchEvent translated_event(*event, this, target);
     ui::TouchStatus status = ProcessTouchEvent(target, &translated_event);
@@ skipping 342 matching lines @@
       base::StringToInt(parts[1], &parsed_height) && parsed_height > 0) {
     bounds.set_size(gfx::Size(parsed_width, parsed_height));
   } else if (use_fullscreen_host_window_) {
     bounds = gfx::Rect(RootWindowHost::GetNativeScreenSize());
   }
 
   return bounds;
 }
 
 }  // namespace aura