Revert r154797: "Move isValid/isCurrentColor from Color to StyleColor"

Source/core/testing/Internals.cpp

 /*
  * 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 699 matching lines @@
             return toHTMLTextFormControlElement(element)->placeholderElement()->textContent();
     }
 
     return String();
 }
 
 void Internals::selectColorInColorChooser(Element* element, const String& colorValue)
 {
     if (!element->hasTagName(inputTag))
         return;
-    toHTMLInputElement(element)->selectColorInColorChooser(StyleColor(colorValue).color());
+    toHTMLInputElement(element)->selectColorInColorChooser(Color(colorValue));
 }
 
 Vector<String> Internals::formControlStateOfPreviousHistoryItem(ExceptionState& es)
 {
     HistoryItem* mainItem = frame()->loader()->history()->previousItem();
     if (!mainItem) {
         es.throwDOMException(InvalidAccessError);
         return Vector<String>();
     }
     String uniqueName = frame()->tree()->uniqueName();
@@ skipping 1480 matching lines @@
         return false;
     sharedContext->getExtensions()->loseContextCHROMIUM(Extensions3D::GUILTY_CONTEXT_RESET_ARB, Extensions3D::INNOCENT_CONTEXT_RESET_ARB);
     // To prevent tests that call loseSharedGraphicsContext3D from being
     // flaky, we call finish so that the context is guaranteed to be lost
     // synchronously (i.e. before returning).
     sharedContext->finish();
     return true;
 }
 
 }