Qualify RuntimeEnabledFeatures.h and remove unnecessary include dir.

Source/bindings/v8/custom/V8ElementCustom.cpp

 /*
  * Copyright (C) 2014 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 "bindings/core/v8/V8Element.h"
 
-#include "RuntimeEnabledFeatures.h"
 #include "bindings/core/v8/V8AnimationEffect.h"
 #include "bindings/core/v8/V8AnimationPlayer.h"
 #include "bindings/v8/Dictionary.h"
 #include "bindings/v8/ExceptionState.h"
 #include "bindings/v8/V8Binding.h"
 #include "bindings/v8/V8BindingMacros.h"
 #include "core/animation/ElementAnimation.h"
 #include "core/dom/Element.h"
 #include "core/frame/UseCounter.h"
+#include "platform/RuntimeEnabledFeatures.h"
 #include "wtf/GetPtr.h"
 
 namespace WebCore {
 
 void V8Element::scrollLeftAttributeSetterCustom(v8::Local<v8::Value> value, const v8::PropertyCallbackInfo<void>& info)
 {
     ExceptionState exceptionState(ExceptionState::SetterContext, "scrollLeft", "Element", info.Holder(), info.GetIsolate());
     Element* impl = V8Element::toNative(info.Holder());
 
     if (RuntimeEnabledFeatures::cssomSmoothScrollEnabled() && value->IsObject()) {
@@ skipping 173 matching lines @@
     default:
         throwArityTypeError(exceptionState, "[1]", info.Length());
         return;
         break;
     }
     exceptionState.throwTypeError("No function was found that matched the signature provided.");
     exceptionState.throwIfNeeded();
 }
 
 } // namespace WebCore