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

chrome/browser/ui/views/toolbar/home_button.cc

Index: chrome/browser/ui/views/toolbar/home_button.cc
diff --git a/chrome/browser/ui/views/toolbar/home_button.cc b/chrome/browser/ui/views/toolbar/home_button.cc
index 26c42017928220520500c05239ba6279d6bf5071..b2d769b0a16b66227a58bbfb4e1f8ab95eb54249 100644
--- a/chrome/browser/ui/views/toolbar/home_button.cc
+++ b/chrome/browser/ui/views/toolbar/home_button.cc
@@ -139,7 +139,7 @@ void HomePageUndoBubble::WindowClosing() {
 HomeImageButton::HomeImageButton(
     views::ButtonListener* listener,
     Browser* browser)
-    : views::ImageButton(listener),
+    : ToolbarButton(listener, NULL),
       browser_(browser) {
 }