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..3afddc293daf1d04851a62058b83f96778feb3df 100644
--- a/ui/base/win/events_win.cc
+++ b/ui/base/win/events_win.cc
@@ -8,6 +8,7 @@
 
 #include "base/logging.h"
 #include "base/time.h"
+#include "base/win/win_util.h"
 #include "ui/base/keycodes/keyboard_code_conversion_win.h"
 #include "ui/gfx/point.h"
 
@@ -84,9 +85,9 @@ 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;
+  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))