DevTools: do not use Internals for inspector highlight tests.

Source/core/testing/Internals.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 216 matching lines @@
     void garbageCollectDocumentResources(Document*) const;
     void evictAllResources() const;
 
     unsigned numberOfLiveNodes() const;
     unsigned numberOfLiveDocuments() const;
     String dumpRefCountedInstanceCounts() const;
     Vector<String> consoleMessageArgumentCounts(Document*) const;
     PassRefPtrWillBeRawPtr<LocalDOMWindow> openDummyInspectorFrontend(const String& url);
     void closeDummyInspectorFrontend();
     Vector<unsigned long> setMemoryCacheCapacities(unsigned long minDeadBytes, unsigned long maxDeadBytes, unsigned long totalBytes);
-    String inspectorHighlightJSON(Node*, ExceptionState&);
 
     String counterValue(Element*);
 
     int pageNumber(Element*, float pageWidth = 800, float pageHeight = 600);
     Vector<String> shortcutIconURLs(Document*) const;
     Vector<String> allIconURLs(Document*) const;
 
     int numberOfPages(float pageWidthInPixels = 800, float pageHeightInPixels = 600);
     String pageProperty(String, int, ExceptionState& = ASSERT_NO_EXCEPTION) const;
     String pageSizeAndMarginsInPixels(int, int, int, int, int, int, int, ExceptionState& = ASSERT_NO_EXCEPTION) const;
@@ skipping 104 matching lines @@
 
     DocumentMarker* markerAt(Node*, const String& markerType, unsigned index, ExceptionState&);
     Member<InternalRuntimeFlags> m_runtimeFlags;
 
     IterationSource* startIteration(ScriptState*, ExceptionState&) override;
 };
 
 } // namespace blink
 
 #endif // Internals_h