GTK: Remove calls that no longer exist and just call the base unref.

webkit/glue/webcursor_gtk.cc

 // Copyright (c) 2011 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 "webkit/glue/webcursor.h"
 
 #include <gdk/gdk.h>
 #include <gtk/gtk.h>
 
 #include "base/logging.h"
@@ skipping 164 matching lines @@
                    custom_size_.width(), custom_size_.height());
   bitmap.allocPixels();
   memcpy(bitmap.getAddr32(0, 0), custom_data_.data(), custom_data_.size());
 
   GdkPixbuf* pixbuf = gfx::GdkPixbufFromSkBitmap(&bitmap);
   GdkCursor* cursor = gdk_cursor_new_from_pixbuf(gdk_display_get_default(),
                                                  pixbuf,
                                                  hotspot_.x(),
                                                  hotspot_.y());
 
-  gdk_pixbuf_unref(pixbuf);
+  g_object_unref(pixbuf);
 
   if (unref_)
-    gdk_cursor_unref(unref_);
+    g_object_unref(unref_);
   unref_ = cursor;
   return cursor;
 }
 
 void WebCursor::InitPlatformData() {
   unref_ = NULL;
   return;
 }
 
 bool WebCursor::SerializePlatformData(Pickle* pickle) const {
@@ skipping 14 matching lines @@
     unref_ = NULL;
   }
   return;
 }
 
 void WebCursor::CopyPlatformData(const WebCursor& other) {
   if (other.unref_)
     unref_ = gdk_cursor_ref(other.unref_);
   return;
 }