Stops javascript alerts and unload dialogs from showing during

chrome/browser/tab_contents/tab_contents_delegate.h

Index: chrome/browser/tab_contents/tab_contents_delegate.h
diff --git a/chrome/browser/tab_contents/tab_contents_delegate.h b/chrome/browser/tab_contents/tab_contents_delegate.h
index e748229027ce9dc9d5ba1cc4e2bd4ca84fbfe42e..4f240982092d8dddd86b84883acead5aff87d2e6 100644
--- a/chrome/browser/tab_contents/tab_contents_delegate.h
+++ b/chrome/browser/tab_contents/tab_contents_delegate.h
@@ -154,6 +154,10 @@ class TabContentsDelegate : public AutomationResourceRoutingDelegate {
   virtual void ShowHtmlDialog(HtmlDialogUIDelegate* delegate,
                               gfx::NativeWindow parent_window);
 
+  // Returns true if javascript dialogs and unload alerts are suppressed.
+  // Default is false.
+  virtual bool ShouldSuppressDialogs();
+
   // Tells us that we've finished firing this tab's beforeunload event.
   // The proceed bool tells us whether the user chose to proceed closing the
   // tab. Returns true if the tab can continue on firing it's unload event.