Move CreateFakeXEvent to x11_util.{h,cc}.

ui/base/x/x11_util.h

Index: ui/base/x/x11_util.h
diff --git a/ui/base/x/x11_util.h b/ui/base/x/x11_util.h
index 6c87e732d7820d8907ccfe251c2abd5af5819610..0147108b0f04680109464377787630a3eb6ff30e 100644
--- a/ui/base/x/x11_util.h
+++ b/ui/base/x/x11_util.h
@@ -16,6 +16,7 @@
 #include <vector>
 
 #include "base/basictypes.h"
+#include "ui/base/events.h"
 #include "ui/base/ui_export.h"
 
 typedef unsigned long Atom;
@@ -235,6 +236,12 @@ int GetMappedButton(int button);
 // received.
 UI_EXPORT void UpdateButtonMap();
 
+// Initializes a XEvent that holds XKeyEvent for testing.
+UI_EXPORT void InitXKeyEventForTesting(EventType type,
+                                       KeyboardCode key_code,
+                                       int flags,
+                                       XEvent* event);
+
 }  // namespace ui
 
 #endif  // UI_BASE_X_X11_UTIL_H_