chrome: Add TabModalConfirmDialog interface.

chrome/browser/ui/cocoa/tab_modal_confirm_dialog_mac.h

Index: chrome/browser/ui/cocoa/tab_modal_confirm_dialog_mac.h
diff --git a/chrome/browser/ui/cocoa/tab_modal_confirm_dialog_mac.h b/chrome/browser/ui/cocoa/tab_modal_confirm_dialog_mac.h
index a71be9cdc3a445d219969e00b7c16f8cb3570c15..2600597653c48f4a5865ec62d36b1b64c08a3098 100644
--- a/chrome/browser/ui/cocoa/tab_modal_confirm_dialog_mac.h
+++ b/chrome/browser/ui/cocoa/tab_modal_confirm_dialog_mac.h
@@ -9,6 +9,7 @@
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/ui/cocoa/constrained_window_mac.h"
+#include "chrome/browser/ui/tab_modal_confirm_dialog.h"
 
 @class ConstrainedWindowAlert;
 class TabContents;
@@ -20,7 +21,8 @@ class TabModalConfirmDialogDelegate;
 // dialog from its constructor and then delete itself when the user dismisses
 // the dialog.
 class TabModalConfirmDialogMac
-    : public ConstrainedWindowMacDelegateSystemSheet {
+    : public TabModalConfirmDialog,
+      public ConstrainedWindowMacDelegateSystemSheet {
  public:
   TabModalConfirmDialogMac(TabModalConfirmDialogDelegate* delegate,
                            TabContents* tab_contents);
@@ -31,6 +33,10 @@ class TabModalConfirmDialogMac
  private:
   virtual ~TabModalConfirmDialogMac();
 
+  // TabModalConfirmDialog methods:
+  virtual void AcceptTabModalDialog() OVERRIDE;
+  virtual void CancelTabModalDialog() OVERRIDE;
+
   scoped_ptr<TabModalConfirmDialogDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(TabModalConfirmDialogMac);