Handle alternate types in HandleMouseEvent.

ui/views/widget/native_widget_win.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_win.h"
 
 #include <dwmapi.h>
 #include <shellapi.h>
 
 #include <algorithm>
@@ skipping 725 matching lines @@
 }
 
 void NativeWidgetWin::HandleNativeBlur(HWND focused_window) {
   delegate_->OnNativeBlur(focused_window);
   InputMethod* input_method = GetInputMethod();
   if (input_method)
     input_method->OnBlur();
 }
 
 bool NativeWidgetWin::HandleMouseEvent(const ui::MouseEvent& event) {
-  ui::MouseEvent dpi_event(event);
-  dpi_event.set_location(ui::win::ScreenToDIPPoint(event.location()));
-  dpi_event.set_root_location(ui::win::ScreenToDIPPoint(event.location()));
-  delegate_->OnMouseEvent(&dpi_event);
-  return dpi_event.handled();
+  static gfx::Transform scale_transform(
+    1/ui::win::GetDeviceScaleFactor(), 0.0,
+    0.0, 1/ui::win::GetDeviceScaleFactor(),
+    0.0, 0.0);
+  if (event.IsMouseWheelEvent()) {
+    ui::MouseWheelEvent dpi_event(
+        static_cast<const ui::MouseWheelEvent&>(event));
+    dpi_event.UpdateForRootTransform(scale_transform);
+    delegate_->OnMouseEvent(&dpi_event);
+    return dpi_event.handled();
+  } else if (event.IsMouseEvent()) {
+    CHECK(!event.IsScrollEvent()); // Scroll events don't happen in Windows.
+    ui::MouseEvent dpi_event(event);
+    dpi_event.UpdateForRootTransform(scale_transform);
+    delegate_->OnMouseEvent(&dpi_event);
+    return dpi_event.handled();
+  }
+  NOTREACHED();
+  return false;
 }
 
 bool NativeWidgetWin::HandleKeyEvent(const ui::KeyEvent& event) {
   delegate_->OnKeyEvent(const_cast<ui::KeyEvent*>(&event));
   return event.handled();
 }
 
 bool NativeWidgetWin::HandleUntranslatedKeyEvent(const ui::KeyEvent& event) {
   InputMethod* input_method = GetInputMethod();
   if (input_method)
@@ skipping 252 matching lines @@
 // static
 bool NativeWidgetPrivate::IsTouchDown() {
   // This currently isn't necessary because we're not generating touch events on
   // windows.  When we do, this will need to be updated.
   return false;
 }
 
 }  // namespace internal
 
 }  // namespace views