Revert of Allow build under GTK+ 2.24.

chrome/browser/ui/libgtk2ui/x11_input_method_context_impl_gtk2.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 "chrome/browser/ui/libgtk2ui/x11_input_method_context_impl_gtk2.h"
 
 #include <gdk/gdk.h>
 #include <gdk/gdkkeysyms.h>
 #include <gdk/gdkx.h>
 
@@ skipping 218 matching lines @@
         keyboard_group = keys[i].group;
         break;
       }
     }
   }
   g_free(keys);
   keys = NULL;
   g_free(keyvals);
   keyvals = NULL;
   // Get a GdkWindow.
-#if GTK_CHECK_VERSION(2,24,0)
   GdkWindow* window = gdk_x11_window_lookup_for_display(display, xkey.window);
-#else
-  GdkWindow* window = gdk_window_lookup_for_display(display, xkey.window);
-#endif
   if (window)
     g_object_ref(window);
   else
-#if GTK_CHECK_VERSION(2,24,0)
     window = gdk_x11_window_foreign_new_for_display(display, xkey.window);
-#else
-    window = gdk_window_foreign_new_for_display(display, xkey.window);
-#endif
   if (!window) {
     LOG(ERROR) << "Cannot get a GdkWindow for a key event.";
     return NULL;
   }
 
   // Create a GdkEvent.
   GdkEventType event_type = xkey.type == KeyPress ?
                             GDK_KEY_PRESS : GDK_KEY_RELEASE;
   GdkEvent* event = gdk_event_new(event_type);
   event->key.type = event_type;
@@ skipping 87 matching lines @@
   if (context != gtk_context_)
     return;
 
   delegate_->OnPreeditStart();
 }
 
 // GtkCommitSignalTrap
 
 X11InputMethodContextImplGtk2::GtkCommitSignalTrap::GtkCommitSignalTrap()
     : is_trap_enabled_(false),
-#if GTK_CHECK_VERSION (2,22,0)
       gdk_event_key_keyval_(GDK_KEY_VoidSymbol),
-#else
-      gdk_event_key_keyval_(GDK_VoidSymbol),
-#endif
       is_signal_caught_(false) {}
 
 void X11InputMethodContextImplGtk2::GtkCommitSignalTrap::StartTrap(
     guint keyval) {
   is_signal_caught_ = false;
   gdk_event_key_keyval_ = keyval;
   is_trap_enabled_ = true;
 }
 
 void X11InputMethodContextImplGtk2::GtkCommitSignalTrap::StopTrap() {
   is_trap_enabled_ = false;
 }
 
 bool X11InputMethodContextImplGtk2::GtkCommitSignalTrap::Trap(
     const base::string16& text) {
   DCHECK(!is_signal_caught_);
   if (is_trap_enabled_ &&
       text.length() == 1 &&
       text[0] == gdk_keyval_to_unicode(gdk_event_key_keyval_)) {
     is_signal_caught_ = true;
     return true;
   } else {
     return false;
   }
 }
 
 }  // namespace libgtk2ui