Revert of Listen for key events in SetupXI2ForXWindow()

chrome/browser/ui/libgtk2ui/x11_input_method_context_impl_gtk2.cc

Index: chrome/browser/ui/libgtk2ui/x11_input_method_context_impl_gtk2.cc
diff --git a/chrome/browser/ui/libgtk2ui/x11_input_method_context_impl_gtk2.cc b/chrome/browser/ui/libgtk2ui/x11_input_method_context_impl_gtk2.cc
index db72e33919b15da0fd6fe68fafc96bf9a2c35be9..bb263c0d9d93ec795f3b3f37bf2c6316c1d21a8a 100644
--- a/chrome/browser/ui/libgtk2ui/x11_input_method_context_impl_gtk2.cc
+++ b/chrome/browser/ui/libgtk2ui/x11_input_method_context_impl_gtk2.cc
@@ -19,7 +19,6 @@
 #include "ui/base/ime/composition_text_util_pango.h"
 #include "ui/base/ime/text_input_client.h"
 #include "ui/events/event.h"
-#include "ui/events/keycodes/keyboard_code_conversion_x.h"
 #include "ui/gfx/x/x11_types.h"
 
 namespace libgtk2ui {
@@ -192,16 +191,8 @@
 
 GdkEvent* X11InputMethodContextImplGtk2::GdkEventFromNativeEvent(
     const base::NativeEvent& native_event) {
-  XEvent xkeyevent;
-  if (native_event->type == GenericEvent) {
-    // If this is an XI2 key event, build a matching core X event, to avoid
-    // having two cases for every use.
-    ui::InitXKeyEventFromXIDeviceEvent(*native_event, &xkeyevent);
-  } else {
-    DCHECK(native_event->type == KeyPress || native_event->type == KeyRelease);
-    xkeyevent.xkey = native_event->xkey;
-  }
-  const XKeyEvent& xkey = xkeyevent.xkey;
+  const XKeyEvent& xkey = native_event->xkey;
+  DCHECK(xkey.type == KeyPress || xkey.type == KeyRelease);
 
   // Get a GdkDisplay.
   GdkDisplay* display = gdk_x11_lookup_xdisplay(xkey.display);