Adding handlers for user gesture callbacks.

Source/web/tests/WebUserGestureTokenTest.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 24 matching lines @@
 #include <gtest/gtest.h>
 #include "WebScopedUserGesture.h"
 #include "WebUserGestureIndicator.h"
 #include "platform/UserGestureIndicator.h"
 
 using namespace blink;
 using namespace WebCore;
 
 namespace {
 
+class GestureHandlerTest : public WebUserGestureHandler {
+public:
+    void onGesture()
+    {
+        m_reached = true;
+    }
+
+    bool m_reached = false;
+};
+
 TEST(WebUserGestureTokenTest, Basic)
 {
     WebUserGestureToken token;
     EXPECT_FALSE(token.hasGestures());
 
     {
         WebScopedUserGesture indicator(token);
         EXPECT_FALSE(WebUserGestureIndicator::isProcessingUserGesture());
     }
 
@@ skipping 12 matching lines @@
         WebUserGestureIndicator::consumeUserGesture();
         EXPECT_FALSE(WebUserGestureIndicator::isProcessingUserGesture());
     }
 
     EXPECT_FALSE(token.hasGestures());
 
     {
         WebScopedUserGesture indicator(token);
         EXPECT_FALSE(WebUserGestureIndicator::isProcessingUserGesture());
     }
+
+    {
+        GestureHandlerTest handler;
+        WebUserGestureIndicator::setHandler(&handler);
+        UserGestureIndicator indicator(DefinitelyProcessingNewUserGesture);
+        EXPECT_TRUE(handler.m_reached);
+    }
 }
 
 }