Use DOM- rather than Windows-based key code for non-layout cases.

ui/events/keycodes/dom4/keycode_converter_data.h

 // Copyright 2013 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.
 
 // This file has no header guard because it is explicily intended
 // to be included more than once with different definitions of the
 // macros USB_KEYMAP and USB_KEYMAP_DECLARATION.
 
 // Data in this file was created by referencing:
 //  [0] USB HID Usage Tables,
@@ skipping 381 matching lines @@
   //            USB      XKB     Win     Mac
   USB_KEYMAP(0x0c006f, 0x00e9, 0x0000, 0xffff, "BrightnessUp", BRIGHTNESS_UP),
   USB_KEYMAP(0x0c0070, 0x00e8, 0x0000, 0xffff, "BrightnessDown",
              BRIGHTNESS_DOWN),  // Display Brightness Decrement
   USB_KEYMAP(0x0c0072, 0x01b7, 0x0000, 0xffff, NULL, BRIGHTNESS_TOGGLE),
   USB_KEYMAP(0x0c0073, 0x0258, 0x0000, 0xffff, NULL, BRIGHTNESS_MINIMIUM),
   USB_KEYMAP(0x0c0074, 0x0259, 0x0000, 0xffff, NULL, BRIGHTNESS_MAXIMUM),
   USB_KEYMAP(0x0c0075, 0x00fc, 0x0000, 0xffff, NULL, BRIGHTNESS_AUTO),
 
   //            USB      XKB     Win     Mac
+  //USB_KEYMAP(0x0c00b0, 0x00d7, 0x????, 0x????, "MediaPlay", MEDIA_PLAY),
+  //USB_KEYMAP(0x0c00b1, 0x007f, 0x????, 0x????, "MediaPause", MEDIA_PAUSE),
+  //USB_KEYMAP(0x0c00b2, 0x00af, 0x????, 0x????, "MediaRecord", MEDIA_RECORD),
+  //USB_KEYMAP(0x0c00b3, 0x00d8, 0x????, 0x????, "MediaFastForward",
+  //           MEDIA_FAST_FORWARD),
+  //USB_KEYMAP(0x0c00b4, 0x00b0, 0x????, 0x????, "MediaRewind", MEDIA_REWIND),
   USB_KEYMAP(0x0c00b5, 0x0000, 0xe019, 0xffff, "MediaTrackNext",
              MEDIA_TRACK_NEXT),
   USB_KEYMAP(0x0c00b6, 0x0000, 0xe010, 0xffff, "MediaTrackPrevious",
              MEDIA_TRACK_PREVIOUS),
   USB_KEYMAP(0x0c00b7, 0x0000, 0xe024, 0xffff, "MediaStop", MEDIA_STOP),
   USB_KEYMAP(0x0c00b8, 0x0000, 0xe02c, 0xffff, "Eject", EJECT),
   USB_KEYMAP(0x0c00cd, 0x0000, 0xe022, 0xffff, "MediaPlayPause",
              MEDIA_PLAY_PAUSE),
   USB_KEYMAP(0x0c00cf, 0x024e, 0x0000, 0xffff, NULL, VOICE_COMMAND),
   // USB#0c0183: AL Consumer Control Configuration
@@ skipping 22 matching lines @@
   // USB#0x0c01a7: AL_Documents
   USB_KEYMAP(0x0c01a7, 0x00f3, 0x0000, 0xffff, NULL, LAUNCH_DOCUMENTS),
   // USB#0x0c01ae: AL Keyboard Layout
   USB_KEYMAP(0x0c01ae, 0x017e, 0x0000, 0xffff, NULL, LAUNCH_KEYBOARD_LAYOUT),
   USB_KEYMAP(0x0c01b1, 0x024d, 0x0000, 0xffff, "LaunchScreenSaver",
              LAUNCH_SCREEN_SAVER),  // AL Screen Saver
   // USB#0c01b4: Home Directory (AL_FileBrowser) (Explorer)
   USB_KEYMAP(0x0c01b4, 0x0098, 0x0000, 0xffff, NULL, LAUNCH_FILE_BROWSER),
   // USB#0x0c01b7: AL Audio Browser
   //USB_KEYMAP(0x0c01b7, 0x0190, 0x0000, 0xffff, NULL, LAUNCH_AUDIO_BROWSER),
+  // USB#0x0c0208: AC Print
+  //USB_KEYMAP(0x0c0208, 0x00da, 0x0000, 0xffff, NULL, PRINT),
   // USB#0x0c0221:  AC_Search
   USB_KEYMAP(0x0c0221, 0x0000, 0xe065, 0xffff, "BrowserSearch", BROWSER_SEARCH),
   // USB#0x0c0223:  AC_Home
   USB_KEYMAP(0x0c0223, 0x0000, 0xe032, 0xffff, "BrowserHome", BROWSER_HOME),
   // USB#0x0c0224:  AC_Back
   USB_KEYMAP(0x0c0224, 0x00a6, 0xe06a, 0xffff, "BrowserBack", BROWSER_BACK),
   // USB#0x0c0225:  AC_Forward
   USB_KEYMAP(0x0c0225, 0x00a7, 0xe069, 0xffff, "BrowserForward",
              BROWSER_FORWARD),
   // USB#0x0c0226:  AC_Stop
@@ skipping 11 matching lines @@
   // USB#0x0c0232:  AC View Toggle
   USB_KEYMAP(0x0c0232, 0x0000, 0x0000, 0xffff, "ZoomToggle", ZOOM_TOGGLE),
   // USB#0x0c0289:  AC_Reply
   USB_KEYMAP(0x0c0289, 0x00f0, 0x0000, 0xffff, "MailReply", MAIL_REPLY),
   // USB#0x0c028b:  AC_ForwardMsg (MailForward)
   USB_KEYMAP(0x0c028b, 0x00f1, 0x0000, 0xffff, "MailForward", MAIL_FORWARD),
   // USB#0x0c028c:  AC_Send
   USB_KEYMAP(0x0c028c, 0x00ef, 0x0000, 0xffff, "MailSend", MAIL_SEND),
 };