[Toolbar] Base toolbar button class with background images for button states

chrome/browser/ui/views/toolbar/toolbar_view.h

Index: chrome/browser/ui/views/toolbar/toolbar_view.h
diff --git a/chrome/browser/ui/views/toolbar/toolbar_view.h b/chrome/browser/ui/views/toolbar/toolbar_view.h
index c68286ee89957becee0fa621563e33d7281c0db8..6818931c37a59f596a2834882bd00db59d053f9e 100644
--- a/chrome/browser/ui/views/toolbar/toolbar_view.h
+++ b/chrome/browser/ui/views/toolbar/toolbar_view.h
@@ -20,10 +20,12 @@
 #include "ui/views/controls/button/menu_button_listener.h"
 #include "ui/views/view.h"
 
+class BackButton;
 class BrowserActionsContainer;
 class Browser;
-class HomeImageButton;
+class HomeButton;
 class ReloadButton;
+class ToolbarButton;
 class WrenchMenu;
 class WrenchMenuModel;
 class WrenchToolbarButton;
@@ -210,10 +212,10 @@ class ToolbarView : public views::AccessiblePaneView,
   int content_shadow_height() const;
 
   // Controls
-  views::ImageButton* back_;
-  views::ImageButton* forward_;
+  BackButton* back_;
+  ToolbarButton* forward_;
   ReloadButton* reload_;
-  HomeImageButton* home_;
+  HomeButton* home_;
   LocationBarView* location_bar_;
   BrowserActionsContainer* browser_actions_;
   WrenchToolbarButton* app_menu_;