Add VectorIconButton functionality to ImageButton.

chrome/browser/first_run/try_chrome_dialog_view.h

Index: chrome/browser/first_run/try_chrome_dialog_view.h
diff --git a/chrome/browser/first_run/try_chrome_dialog_view.h b/chrome/browser/first_run/try_chrome_dialog_view.h
index 1daa77f5b09642561913ac3deb94e20f551cc192..eb85b3ef09d44d2446fd0868dd7a8f58b8559033 100644
--- a/chrome/browser/first_run/try_chrome_dialog_view.h
+++ b/chrome/browser/first_run/try_chrome_dialog_view.h
@@ -10,7 +10,7 @@
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "ui/gfx/native_widget_types.h"
-#include "ui/views/controls/button/button.h"
+#include "ui/views/controls/button/image_button.h"
 #include "ui/views/controls/link_listener.h"
 
 namespace gfx {
@@ -55,7 +55,7 @@ class Widget;
 //   | [x] Make it the default browser       [ OK ]  |
 //   +-----------------------------------------------+
 
-class TryChromeDialogView : public views::ButtonListener,
+class TryChromeDialogView : public views::ImageButtonDelegate,
                             public views::LinkListener {
  public:
   // Receives a handle to the active modal dialog, or NULL when the active
@@ -100,7 +100,7 @@ class TryChromeDialogView : public views::ButtonListener,
   // |h|. This is best effort, so we don't care much if the operation fails.
   void SetToastRegion(HWND window, int w, int h);
 
-  // views::ButtonListener:
+  // views::ImageButtonDelegate:
   // We have two buttons and according to what the user clicked we set |result_|
   // and we should always close and end the modal loop.
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;