Remove the compile time flag for DATALIST Element.

Source/core/rendering/RenderTheme.cpp

Index: Source/core/rendering/RenderTheme.cpp
diff --git a/Source/core/rendering/RenderTheme.cpp b/Source/core/rendering/RenderTheme.cpp
index 5f5a0e4994797e61db6de27fb76dcc8febd103e7..17057e1c170cfcd76eac33e2f0ecad799c9c290c 100644
--- a/Source/core/rendering/RenderTheme.cpp
+++ b/Source/core/rendering/RenderTheme.cpp
@@ -51,13 +51,11 @@
 #include "core/rendering/RenderInputSpeech.h"
 #endif
 
-#if ENABLE(DATALIST_ELEMENT)
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/html/HTMLCollection.h"
 #include "core/html/HTMLDataListElement.h"
 #include "core/html/HTMLOptionElement.h"
 #include "core/html/parser/HTMLParserIdioms.h"
-#endif
 
 // The methods in this file are shared by all themes on every platform.
 
@@ -890,7 +888,6 @@ bool RenderTheme::paintMeter(RenderObject*, const PaintInfo&, const IntRect&)
     return true;
 }
 
-#if ENABLE(DATALIST_ELEMENT)
 LayoutUnit RenderTheme::sliderTickSnappingThreshold() const
 {
     return 0;
@@ -977,7 +974,6 @@ void RenderTheme::paintSliderTicks(RenderObject* o, const PaintInfo& paintInfo,
         paintInfo.context->fillRect(tickRect);
     }
 }
-#endif
 
 double RenderTheme::animationRepeatIntervalForProgressBar(RenderProgress*) const
 {