Fix the handling of user gestures for external protocol handler dialogs.

chrome/browser/external_protocol/external_protocol_handler.h

Index: chrome/browser/external_protocol/external_protocol_handler.h
diff --git a/chrome/browser/external_protocol/external_protocol_handler.h b/chrome/browser/external_protocol/external_protocol_handler.h
index 7c934c5f7c6db51fe133bc4f5e2ad581836dd512..f8761d14cd5f233ffc05e0ed5afcb33df73071e7 100644
--- a/chrome/browser/external_protocol/external_protocol_handler.h
+++ b/chrome/browser/external_protocol/external_protocol_handler.h
@@ -96,11 +96,17 @@ class ExternalProtocolHandler {
   // preferences for them do not already exist.
   static void PrepopulateDictionary(base::DictionaryValue* win_pref);
 
-  // Allows LaunchUrl to proceed with launching an external protocol handler.
-  // This is typically triggered by a user gesture, but is also called for
-  // each extension API function. Note that each call to LaunchUrl resets
-  // the state to false (not allowed).
-  static void PermitLaunchUrl();
+  class ScopedUserGesture {
+   public:
+     ScopedUserGesture();
+     ~ScopedUserGesture();
+   private:
+    DISALLOW_COPY_AND_ASSIGN(ScopedUserGesture);
+  };
+
+ private:
+   DISALLOW_COPY_AND_ASSIGN(ExternalProtocolHandler);
 };
 
+
 #endif  // CHROME_BROWSER_EXTERNAL_PROTOCOL_EXTERNAL_PROTOCOL_HANDLER_H_