Use new is*Element() helper functions more in web/ code

Source/web/ChromeClientImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * 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.
@@ skipping 525 matching lines @@
 }
 
 void ChromeClientImpl::mouseDidMoveOverElement(
     const HitTestResult& result, unsigned modifierFlags)
 {
     if (!m_webView->client())
         return;
 
     WebURL url;
     // Find out if the mouse is over a link, and if so, let our UI know...
-    if (result.isLiveLink() && !result.absoluteLinkURL().string().isEmpty())
+    if (result.isLiveLink() && !result.absoluteLinkURL().string().isEmpty()) {
         url = result.absoluteLinkURL();
-    else if (result.innerNonSharedNode()
-             && (result.innerNonSharedNode()->hasTagName(HTMLNames::objectTag)
-                 || result.innerNonSharedNode()->hasTagName(HTMLNames::embedTag))) {
+    } else if (result.innerNonSharedNode()
+        && (isHTMLObjectElement(*result.innerNonSharedNode())
+            || isHTMLEmbedElement(*result.innerNonSharedNode()))) {
         RenderObject* object = result.innerNonSharedNode()->renderer();
         if (object && object->isWidget()) {
             Widget* widget = toRenderWidget(object)->widget();
             if (widget && widget->isPluginContainer()) {
                 WebPluginContainerImpl* plugin = toWebPluginContainerImpl(widget);
                 url = plugin->plugin()->linkAtPosition(result.roundedPointInInnerNodeFrame());
             }
         }
     }
 
@@ skipping 396 matching lines @@
 {
     return static_cast<NavigatorContentUtilsClient::CustomHandlersState>(m_webView->client()->isProtocolHandlerRegistered(scheme, baseURL, url));
 }
 
 void NavigatorContentUtilsClientImpl::unregisterProtocolHandler(const String& scheme, const WebCore::KURL& baseURL, const WebCore::KURL& url)
 {
     m_webView->client()->unregisterProtocolHandler(scheme, baseURL, url);
 }
 
 } // namespace blink