aura: Fix shift/ctrl/alt keyevents with RWHVA and X11.

ui/base/keycodes/keyboard_code_conversion_x.cc

 // Copyright (c) 2011 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/base/keycodes/keyboard_code_conversion_x.h"
 
 #include <X11/keysym.h>
 #include <X11/Xlib.h>
+#include <X11/Xutil.h>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
+#include "base/utf_string_conversions.h"
 
 namespace ui {
 
 // Get an ui::KeyboardCode from an X keyevent
 KeyboardCode KeyboardCodeFromXKeyEvent(XEvent* xev) {
   KeySym keysym = XLookupKeysym(&xev->xkey, 0);
 
   KeyboardCode keycode = KeyboardCodeFromXKeysym(keysym);
   if (keycode == VKEY_UNKNOWN) {
     keysym = DefaultXKeysymFromHardwareKeycode(xev->xkey.keycode);
@@ skipping 260 matching lines @@
     case XK_F24:
       return static_cast<KeyboardCode>(VKEY_F1 + (keysym - XK_F1));
 
     // TODO(sad): some keycodes are still missing.
   }
 
   DLOG(WARNING) << "Unknown keycode: " << keysym;
   return VKEY_UNKNOWN;
 }
 
+unsigned int DefaultSymbolFromXEvent(XEvent* xev) {
+  char buf[6];
+  int bytes_written = XLookupString(&xev->xkey, buf, 6, NULL, NULL);
+  DCHECK_LE(bytes_written, 6);
+
+  string16 result;
+  return (bytes_written > 0 && UTF8ToUTF16(buf, bytes_written, &result) &&
+          result.length() == 1) ? result[0] : 0;
+}
+
 unsigned int DefaultXKeysymFromHardwareKeycode(unsigned int hardware_code) {
   static const unsigned int kHardwareKeycodeMap[] = {
     0,                // 0x00:
     0,                // 0x01:
     0,                // 0x02:
     0,                // 0x03:
     0,                // 0x04:
     0,                // 0x05:
     0,                // 0x06:
     0,                // 0x07:
@@ skipping 68 matching lines @@
     XK_F10,           // 0x4C: XK_F10
     XK_Num_Lock,      // 0x4D: XK_Num_Lock
     XK_Scroll_Lock,   // 0x4E: XK_Scroll_Lock
   };
 
   return hardware_code < arraysize(kHardwareKeycodeMap) ?
       kHardwareKeycodeMap[hardware_code] : 0;
 }
 
 }  // namespace ui