Removing useless Win7 checks + standardize its use

ui/views/win/hwnd_message_handler.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/win/hwnd_message_handler.h"
 
 #include <dwmapi.h>
 #include <oleacc.h>
 #include <shellapi.h>
 #include <tchar.h>
@@ skipping 1640 matching lines @@
   if (get_pointer_type && get_pointer_type(pointer_id, &pointer_type) &&
       pointer_type == PT_TOUCHPAD)
     return PA_NOACTIVATE;
   SetMsgHandled(FALSE);
   return -1;
 }
 
 LRESULT HWNDMessageHandler::OnPointerEvent(UINT message,
                                            WPARAM w_param,
                                            LPARAM l_param) {
-  // WM_POINTER is not supported on Windows 7 or lower.
-  if (base::win::GetVersion() <= base::win::VERSION_WIN7) {
+  // WM_POINTER is not supported on Windows 7.
+  if (base::win::GetVersion() == base::win::VERSION_WIN7) {
     SetMsgHandled(FALSE);
     return -1;
   }
 
   UINT32 pointer_id = GET_POINTERID_WPARAM(w_param);
   using GetPointerTypeFn = BOOL(WINAPI*)(UINT32, POINTER_INPUT_TYPE*);
   POINTER_INPUT_TYPE pointer_type;
   static GetPointerTypeFn get_pointer_type = reinterpret_cast<GetPointerTypeFn>(
       GetProcAddress(GetModuleHandleA("user32.dll"), "GetPointerType"));
   // If the WM_POINTER messages are not sent from a stylus device, then we do
@@ skipping 1240 matching lines @@
   MONITORINFO monitor_info = {sizeof(monitor_info)};
   GetMonitorInfo(MonitorFromWindow(hwnd(), MONITOR_DEFAULTTOPRIMARY),
                  &monitor_info);
   gfx::Rect shrunk_rect(monitor_info.rcMonitor);
   shrunk_rect.set_height(shrunk_rect.height() - 1);
   background_fullscreen_hack_ = true;
   SetBoundsInternal(shrunk_rect, false);
 }
 
 }  // namespace views