Enable hidpi on Linux, refactor a bit on Windows to share

ui/events/win/events_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 <windowsx.h>
 
 #include "ui/events/event_constants.h"
 
 #include "base/logging.h"
 #include "base/time/time.h"
 #include "base/win/win_util.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/keycodes/keyboard_code_conversion_win.h"
 #include "ui/gfx/point.h"
-#include "ui/gfx/win/dpi.h"
 
 namespace ui {
 
 namespace {
 
 // From MSDN: "Mouse" events are flagged with 0xFF515700 if they come
 // from a touch or stylus device.  In Vista or later, they are also flagged
 // with 0x80 if they come from touch.
 #define MOUSEEVENTF_FROMTOUCH (0xFF515700 | 0x80)
 
@@ skipping 379 matching lines @@
 }
 
 LPARAM GetLParamFromScanCode(uint16 scan_code) {
   LPARAM l_param = static_cast<LPARAM>(scan_code & 0x00FF) << 16;
   if ((scan_code & 0xE000) == 0xE000)
     l_param |= (1 << 24);
   return l_param;
 }
 
 }  // namespace ui