Add a CodeToNativeKeycode helper that converts UIEvent code to native code.

ui/base/keycodes/usb_keycode_map.h

Index: ui/base/keycodes/usb_keycode_map.h
diff --git a/ui/base/keycodes/usb_keycode_map.h b/ui/base/keycodes/usb_keycode_map.h
index 90cd7ed71723e4ba6dcdb3ecb9248bac942140bd..2ec7db8edc39b9246b64993671096e0bc72a1b78 100644
--- a/ui/base/keycodes/usb_keycode_map.h
+++ b/ui/base/keycodes/usb_keycode_map.h
@@ -438,3 +438,14 @@ inline const char* UsbKeycodeToCode(uint32_t usb_keycode) {
   }
   return InvalidKeyboardEventCode();
 }
+
+inline uint16_t CodeToNativeKeycode(const char* code) {

[garykac, 2013/09/04 23:04:03]

Please move this up next to NativeKeycodeToCode. The functions at the bottom are
all USB-related.

[weitao, 2013/09/04 23:41:27]

Done.

+  if (code) {
+    // TODO: sort |usb_keycode_map| by |code| so we can use binary search here.
+    for (size_t i = 0; i < arraysize(usb_keycode_map); ++i) {
+      if (usb_keycode_map[i].code && strcmp(usb_keycode_map[i].code, code) == 0)
+        return usb_keycode_map[i].native_keycode;
+    }
+  }
+  return InvalidNativeKeycode();
+}