Distinguish between keystroke and character events.

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"
@@ skipping 241 matching lines @@
 
 const char* CodeFromNative(const base::NativeEvent& native_event) {
   const uint16 scan_code = GetScanCodeFromLParam(native_event.lParam);
   return CodeForWindowsScanCode(scan_code);
 }
 
 uint32 PlatformKeycodeFromNative(const base::NativeEvent& native_event) {
   return static_cast<uint32>(native_event.wParam);
 }
 
+bool IsCharFromNative(const base::NativeEvent& native_event) {
+  return native_event.message == WM_CHAR;
+}
+
 int GetChangedMouseButtonFlagsFromNative(
     const base::NativeEvent& native_event) {
   switch (GetNativeMouseKey(native_event)) {
     case MK_LBUTTON:
       return EF_LEFT_MOUSE_BUTTON;
     case MK_MBUTTON:
       return EF_MIDDLE_MOUSE_BUTTON;
     case MK_RBUTTON:
       return EF_RIGHT_MOUSE_BUTTON;
     // TODO: add support for MK_XBUTTON1.
@@ skipping 129 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