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

chrome/browser/gtk/tabs/tab_renderer_gtk.h

 // Copyright (c) 2006-2008 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_RENDERER_GTK_H_
 #define CHROME_BROWSER_GTK_TABS_TAB_RENDERER_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include "app/animation.h"
@@ skipping 160 matching lines @@
 
   GtkWidget* widget() const { return tab_.get(); }
 
  protected:
   const gfx::Rect& title_bounds() const { return title_bounds_; }
   const gfx::Rect& close_button_bounds() const { return close_button_bounds_; }
 
   // Returns the title of the Tab.
   std::wstring GetTitle() const;
 
-  // Called by TabGtk to notify the renderer that the tab is being hovered.
-  void OnMouseEntered();
+  // enter-notify-event handler that signals when the mouse enters the tab.
+  static gboolean OnEnterNotifyEvent(GtkWidget* widget, GdkEventCrossing* event,
+                                     TabRendererGtk* tab);
 
-  // Called by TabGtk to notify the renderer that the tab is no longer being
-  // hovered.
-  void OnMouseExited();
+  // leave-notify-event handler that signals when the mouse enters the tab.
+  static gboolean OnLeaveNotifyEvent(GtkWidget* widget, GdkEventCrossing* event,
+                                     TabRendererGtk* tab);
 
  private:
   class FavIconCrashAnimation;
 
   // Model data. We store this here so that we don't need to ask the underlying
   // model, which is tricky since instances of this object can outlive the
   // corresponding objects in the underlying model.
   struct TabData {
     SkBitmap favicon;
     string16 title;
@@ skipping 148 matching lines @@
   // The close button.
   scoped_ptr<CustomDrawButton> close_button_;
 
   // The current color of the close button.
   SkColor close_button_color_;
 
   DISALLOW_COPY_AND_ASSIGN(TabRendererGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_TABS_TAB_RENDERER_GTK_H_