Transform XML tree viewer to blink-in-js implementation.

Source/core/core.gypi

 {
     'includes': [
       'core_generated.gypi',
     ],
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'animation/Animation.idl',
             'animation/AnimationEffect.idl',
             'animation/AnimationPlayer.idl',
@@ skipping 476 matching lines @@
             'imagebitmap/ImageBitmapFactories.idl',
             'imagebitmap/WindowImageBitmapFactories.idl',
             'page/WindowPagePopup.idl',
             'svg/SVGDocument.idl',
             'svg/SVGFilterPrimitiveStandardAttributes.idl',
             'svg/SVGFitToViewBox.idl',
             'svg/SVGTests.idl',
             'svg/SVGURIReference.idl',
             'svg/SVGZoomAndPan.idl',
             'workers/AbstractWorker.idl',
+            'xml/DocumentXMLTreeViewer.idl',
             'xml/DocumentXPathEvaluator.idl',
         ],
         # interfaces that inherit from Event, including Event itself
         'core_event_idl_files': [
             'css/FontFaceSetLoadEvent.idl',
             'css/MediaQueryListEvent.idl',
             'events/AnimationPlayerEvent.idl',
             'events/ApplicationCacheErrorEvent.idl',
             'events/AutocompleteErrorEvent.idl',
             'events/BeforeUnloadEvent.idl',
@@ skipping 1360 matching lines @@
             'xml/XMLHttpRequest.cpp',
             'xml/XMLHttpRequest.h',
             'xml/XMLHttpRequestEventTarget.h',
             'xml/XMLHttpRequestProgressEvent.h',
             'xml/XMLHttpRequestProgressEventThrottle.cpp',
             'xml/XMLHttpRequestProgressEventThrottle.h',
             'xml/XMLHttpRequestUpload.cpp',
             'xml/XMLHttpRequestUpload.h',
             'xml/XMLSerializer.cpp',
             'xml/XMLSerializer.h',
-            'xml/XMLTreeViewer.cpp',
-            'xml/XMLTreeViewer.h',
             'xml/XPathEvaluator.cpp',
             'xml/XPathEvaluator.h',
             'xml/XPathExpression.cpp',
             'xml/XPathExpression.h',
             'xml/XPathExpressionNode.cpp',
             'xml/XPathExpressionNode.h',
             'xml/XPathFunctions.cpp',
             'xml/XPathFunctions.h',
             'xml/XPathNSResolver.cpp',
             'xml/XPathNSResolver.h',
@@ skipping 1613 matching lines @@
             'rendering/shapes/BoxShapeTest.cpp',
             'rendering/style/OutlineValueTest.cpp',
             'testing/PrivateScriptTestTest.cpp',
             'streams/ReadableStreamTest.cpp',
             'testing/UnitTestHelpers.cpp',
             'testing/UnitTestHelpers.h',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }