Use the stateless GC::fillRect variant when possible.

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 5c729aedc2032322e09227d393df7f35c493127f..b150048a564f303cdd7ad83b48a5835f45ed66cc 100644
--- a/Source/core/rendering/RenderTheme.cpp
+++ b/Source/core/rendering/RenderTheme.cpp
@@ -875,8 +875,6 @@ void RenderTheme::paintSliderTicks(RenderObject* o, const PaintInfo& paintInfo,
         tickRegionWidth = trackBounds.height() - thumbSize.width();
     }
     RefPtrWillBeRawPtr<HTMLDataListOptionsCollection> options = dataList->options();
-    GraphicsContextStateSaver stateSaver(*paintInfo.context);
-    paintInfo.context->setFillColor(o->resolveColor(CSSPropertyColor));
     for (unsigned i = 0; HTMLOptionElement* optionElement = options->item(i); i++) {
         String value = optionElement->value();
         if (!input->isValidValue(value))
@@ -889,7 +887,7 @@ void RenderTheme::paintSliderTicks(RenderObject* o, const PaintInfo& paintInfo,
             tickRect.setX(tickPosition);
         else
             tickRect.setY(tickPosition);
-        paintInfo.context->fillRect(tickRect);
+        paintInfo.context->fillRect(tickRect, o->resolveColor(CSSPropertyColor));
     }
 }