Use new is*Element() helper functions in inspector code

Source/core/inspector/InspectorCanvasAgent.cpp

 /*
  * Copyright (C) 2012 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 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/inspector/InspectorCanvasAgent.h"
 
-#include "HTMLNames.h"
 #include "bindings/v8/ScriptObject.h"
 #include "bindings/v8/ScriptProfiler.h"
 #include "core/html/HTMLCanvasElement.h"
 #include "core/inspector/BindingVisitors.h"
 #include "core/inspector/InjectedScript.h"
 #include "core/inspector/InjectedScriptCanvasModule.h"
 #include "core/inspector/InjectedScriptManager.h"
 #include "core/inspector/InspectorPageAgent.h"
 #include "core/inspector/InspectorState.h"
 #include "core/inspector/InstrumentingAgents.h"
@@ skipping 218 matching lines @@
     class NodeVisitor FINAL : public WrappedNodeVisitor {
     public:
         NodeVisitor(Page* page, FramesWithUninstrumentedCanvases& result)
             : m_page(page)
             , m_framesWithUninstrumentedCanvases(result)
         {
         }
 
         virtual void visitNode(Node* node) OVERRIDE
         {
-            if (!node->hasTagName(HTMLNames::canvasTag) || !node->document().frame())
+            ASSERT(node);
+            if (!isHTMLCanvasElement(*node) || !node->document().frame())
                 return;
 
             LocalFrame* frame = node->document().frame();
             if (frame->page() != m_page)
                 return;
 
             if (toHTMLCanvasElement(node)->renderingContext())
                 m_framesWithUninstrumentedCanvases.set(frame, true);
         }
 
@@ skipping 57 matching lines @@
     ErrorString error;
     for (FramesWithUninstrumentedCanvases::const_iterator it = m_framesWithUninstrumentedCanvases.begin(); it != m_framesWithUninstrumentedCanvases.end(); ++it) {
         InjectedScriptCanvasModule module = injectedScriptCanvasModule(&error, mainWorldScriptState(it->key));
         if (!module.hasNoValue())
             module.markFrameEnd();
     }
 }
 
 } // namespace WebCore