Remove the compile time flag for DATALIST Element.

Source/core/rendering/RenderThemeChromiumMac.mm

Index: Source/core/rendering/RenderThemeChromiumMac.mm
diff --git a/Source/core/rendering/RenderThemeChromiumMac.mm b/Source/core/rendering/RenderThemeChromiumMac.mm
index 445633332d1ca96b16f8095941f06615fd9031fe..4dd89c15384d6eefaf482831daf98de2e1e7e5c4 100644
--- a/Source/core/rendering/RenderThemeChromiumMac.mm
+++ b/Source/core/rendering/RenderThemeChromiumMac.mm
@@ -1371,9 +1371,7 @@ bool RenderThemeChromiumMac::paintSliderTrack(RenderObject* o, const PaintInfo&
     CGContextRef context = localContext.cgContext();
     CGColorSpaceRef cspace = deviceRGBColorSpaceRef();
 
-#if ENABLE(DATALIST_ELEMENT)
     paintSliderTicks(o, paintInfo, r);
-#endif
 
     GraphicsContextStateSaver stateSaver(*paintInfo.context);
     CGContextClipToRect(context, bounds);
@@ -1716,7 +1714,6 @@ bool RenderThemeChromiumMac::paintSearchFieldResultsButton(RenderObject* o, cons
     return false;
 }
 
-#if ENABLE(DATALIST_ELEMENT)
 IntSize RenderThemeChromiumMac::sliderTickSize() const
 {
     return IntSize(1, 3);
@@ -1726,7 +1723,6 @@ int RenderThemeChromiumMac::sliderTickOffsetFromTrackCenter() const
 {
     return -9;
 }
-#endif
 
 const int sliderThumbWidth = 15;
 const int sliderThumbHeight = 15;
@@ -1928,12 +1924,10 @@ String RenderThemeChromiumMac::extraDefaultStyleSheet()
            String(themeChromiumUserAgentStyleSheet, sizeof(themeChromiumUserAgentStyleSheet));
 }
 
-#if ENABLE(DATALIST_ELEMENT)
 LayoutUnit RenderThemeChromiumMac::sliderTickSnappingThreshold() const
 {
     return RenderThemeChromiumCommon::sliderTickSnappingThreshold();
 }
-#endif
 
 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI) && ENABLE(CALENDAR_PICKER)
 bool RenderThemeChromiumMac::supportsCalendarPicker(const AtomicString& type) const