gtk: Move the enter/leave-notify-event handling to TabRendererGtk and hook up...

chrome/browser/gtk/tabs/tab_gtk.h

 // Copyright (c) 2009 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.
 
 #ifndef CHROME_BROWSER_GTK_TABS_TAB_GTK_H_
 #define CHROME_BROWSER_GTK_TABS_TAB_GTK_H_
 
 #include "app/theme_provider.h"
 #include "base/basictypes.h"
 #include "base/message_loop.h"
@@ skipping 84 matching lines @@
   virtual void UpdateData(TabContents* contents, bool loading_only);
 
   // button-press-event handler that handles mouse clicks.
   static gboolean OnMousePress(GtkWidget* widget, GdkEventButton* event,
                                TabGtk* tab);
 
   // button-release-event handler that handles mouse click releases.
   static gboolean OnMouseRelease(GtkWidget* widget, GdkEventButton* event,
                                  TabGtk* tab);
 
-  // enter-notify-event handler that signals when the mouse enters the tab.
-  static gboolean OnEnterNotify(GtkWidget* widget, GdkEventCrossing* event,
-                                TabGtk* tab);
-
-  // leave-notify-event handler that signals when the mouse enters the tab.
-  static gboolean OnLeaveNotify(GtkWidget* widget, GdkEventCrossing* event,
-                                TabGtk* tab);
-
   // drag-begin handler that signals when a drag action begins.
   static void OnDragBegin(GtkWidget* widget, GdkDragContext* context,
                           TabGtk* tab);
 
   // drag-end handler that signals when a drag action ends.
   static void OnDragEnd(GtkWidget* widget, GdkDragContext* context,
                         TabGtk* tab);
 
   // drag-failed handler that is emitted when the drag fails.
   static gboolean OnDragFailed(GtkWidget* widget, GdkDragContext* context,
@@ skipping 32 matching lines @@
   // DCHECK.
   GtkWidget* event_box_;
 
   // True if this tab is being dragged.
   bool dragging_;
 
   DISALLOW_COPY_AND_ASSIGN(TabGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_TABS_TAB_GTK_H_