Adding handlers for user gesture callbacks.

Source/web/WebUserGestureIndicator.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 20 matching lines @@
 #include "config.h"
 #include "WebUserGestureIndicator.h"
 
 #include "WebUserGestureToken.h"
 #include "platform/UserGestureIndicator.h"
 
 using namespace WebCore;
 
 namespace blink {
 
+class WebUserGestureHandlerHolder : public UserGestureHandler {
+public:
+    WebUserGestureHandlerHolder()
+        : m_handler(0)
+    {
+        UserGestureIndicator::setHandler(this);
+    }
+
+    virtual void onGesture()
+    {
+        if (m_handler)
+            m_handler->onGesture();
+    }
+
+    void setHandler(WebUserGestureHandler* handler)
+    {
+        m_handler = handler;
+    }
+
+private:
+    WebUserGestureHandler* m_handler;
+};
+
+WebUserGestureHandlerHolder* gestureHandler()
+{
+    DEFINE_STATIC_LOCAL(WebUserGestureHandlerHolder, handler, ());
+    return &handler;
+}
+
 bool WebUserGestureIndicator::isProcessingUserGesture()
 {
     return UserGestureIndicator::processingUserGesture();
 }
 
 bool WebUserGestureIndicator::consumeUserGesture()
 {
     return UserGestureIndicator::consumeUserGesture();
 }
 
 WebUserGestureToken WebUserGestureIndicator::currentUserGestureToken()
 {
     return WebUserGestureToken(UserGestureIndicator::currentToken());
 }
 
+void WebUserGestureIndicator::setHandler(WebUserGestureHandler* handler)
+{
+    gestureHandler()->setHandler(handler);
+}
+
 } // namespace blink