Revert of Removing X11 native_event uses for key events.

ui/events/event_utils.h

Index: ui/events/event_utils.h
diff --git a/ui/events/event_utils.h b/ui/events/event_utils.h
index f1f5f34d2754a3567268a7a8580abdfd2246431a..312d580e0e6d4dde4261c3bb147d67217351ee06 100644
--- a/ui/events/event_utils.h
+++ b/ui/events/event_utils.h
@@ -5,10 +5,8 @@
 #ifndef UI_EVENTS_EVENT_UTILS_H_
 #define UI_EVENTS_EVENT_UTILS_H_
 
-#include "base/basictypes.h"
 #include "base/event_types.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/strings/string16.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/gfx/display.h"
@@ -89,9 +87,26 @@
 EVENTS_EXPORT uint32 PlatformKeycodeFromNative(
     const base::NativeEvent& native_event);
 
+// Returns the windows key code. Note that this value is different from
+// KeyboardCodeFromNative (there is a divergence between ui::KeyboardCode and
+// windows key codes).
+EVENTS_EXPORT uint32 WindowsKeycodeFromNative(
+    const base::NativeEvent& native_event);
+
+// Returns the text generated by this keystroke. Used in the value we pass to
+// blink.
+EVENTS_EXPORT uint16 TextFromNative(const base::NativeEvent& native_event);
+
+// Returns the unmodified text generated by this keystroke. Used in the value
+// we pass to blink.
+EVENTS_EXPORT uint16 UnmodifiedTextFromNative(
+    const base::NativeEvent& native_event);
+
+#if defined(OS_LINUX)
 // Returns a control character sequences from a |windows_key_code|.
-EVENTS_EXPORT base::char16 GetControlCharacterForKeycode(int windows_key_code,
-                                                         bool shift);
+EVENTS_EXPORT uint16 GetControlCharacterForKeycode(int windows_key_code,
+                                                   bool shift);
+#endif
 
 // Returns true if the keyboard event is a character event rather than
 // a keystroke event.