Remove windows/mac/ios specific code from //ui

ui/events/keycodes/dom4/keycode_converter.cc

 // 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.
 
 #include "ui/events/keycodes/dom4/keycode_converter.h"
 
 namespace ui {
 
 namespace {
 
-#if defined(OS_WIN)
-#define USB_KEYMAP(usb, xkb, win, mac, code) {usb, win, code}
-#elif defined(OS_LINUX)
+#if defined(OS_LINUX)
 #define USB_KEYMAP(usb, xkb, win, mac, code) {usb, xkb, code}
-#elif defined(OS_MACOSX)
-#define USB_KEYMAP(usb, xkb, win, mac, code) {usb, mac, code}
 #else
 #define USB_KEYMAP(usb, xkb, win, mac, code) {usb, 0, code}
 #endif
 #include "ui/events/keycodes/dom4/keycode_converter_data.h"
 
 const size_t kKeycodeMapEntries = arraysize(usb_keycode_map);
 
 }  // namespace
 
 // static
@@ skipping 51 matching lines @@
 // static
 uint16_t KeycodeConverter::InvalidUsbKeycode() {
   return static_cast<uint16_t>(usb_keycode_map[0].usb_keycode);
 }
 
 // static
 uint16_t KeycodeConverter::UsbKeycodeToNativeKeycode(uint32_t usb_keycode) {
   // Deal with some special-cases that don't fit the 1:1 mapping.
   if (usb_keycode == 0x070032) // non-US hash.
     usb_keycode = 0x070031; // US backslash.
-#if defined(OS_MACOSX)
-  if (usb_keycode == 0x070046) // PrintScreen.
-    usb_keycode = 0x070068; // F13.
-#endif
 
   for (size_t i = 0; i < kKeycodeMapEntries; ++i) {
     if (usb_keycode_map[i].usb_keycode == usb_keycode)
       return usb_keycode_map[i].native_keycode;
   }
   return InvalidNativeKeycode();
 }
 
 // static
 uint32_t KeycodeConverter::NativeKeycodeToUsbKeycode(uint16_t native_keycode) {
@@ skipping 23 matching lines @@
   for (size_t i = 0; i < kKeycodeMapEntries; ++i) {
     if (usb_keycode_map[i].code &&
         strcmp(usb_keycode_map[i].code, code) == 0) {
       return usb_keycode_map[i].usb_keycode;
     }
   }
   return InvalidUsbKeycode();
 }
 
 }  // namespace ui