ui: Use utility functions from base/win throughout.

ui/base/win/events_win.cc

Index: ui/base/win/events_win.cc
diff --git a/ui/base/win/events_win.cc b/ui/base/win/events_win.cc
index a014ce06280590dfc3a182a1d00e697a5a08e0cf..bb7a3402d0a0a9a9eb212ab813463f0fec43fdff 100644
--- a/ui/base/win/events_win.cc
+++ b/ui/base/win/events_win.cc
@@ -84,9 +84,9 @@ bool IsKeyEvent(const base::NativeEvent& native_event) {
 // Checks the current global state and the state sent by client mouse messages.
 int KeyStateFlagsFromNative(const base::NativeEvent& native_event) {
   int flags = 0;
-  flags |= (GetKeyState(VK_MENU) & 0x80) ? ui::EF_ALT_DOWN : 0;
-  flags |= (GetKeyState(VK_SHIFT) & 0x80) ? ui::EF_SHIFT_DOWN : 0;
-  flags |= (GetKeyState(VK_CONTROL) & 0x80) ? ui::EF_CONTROL_DOWN : 0;
+  flags |= base::win::IsAltPressed() ? ui::EF_ALT_DOWN : ui::EF_NONE;

[tfarina, 2012/05/30 00:04:29]

this code is duplicated with GetModifiersFromKeyState() implemented in
ui/views/events/event_win.cc. But I can't use it here because ui/base/ can't
depend in ui/views.

Looks like we should move GetModifiersFromKeyState() from
ui/views/events/event.h to ui/base/win?

+  flags |= base::win::IsShiftPressed() ? ui::EF_SHIFT_DOWN : ui::EF_NONE;
+  flags |= base::win::IsCtrlPressed() ? ui::EF_CONTROL_DOWN : ui::EF_NONE;
 
   // Check key messages for the extended key flag.
   if (IsKeyEvent(native_event))