Removing unnecessary blink::prefix

Source/web/painting/PaintAggregator.cpp

Index: Source/web/painting/PaintAggregator.cpp
diff --git a/Source/web/painting/PaintAggregator.cpp b/Source/web/painting/PaintAggregator.cpp
index 1d5a1d5c700cb4ed5a61c49ca8a3cfd11e7d3c36..dd249700fa4a968b927434d7a1954d7c55d310df 100644
--- a/Source/web/painting/PaintAggregator.cpp
+++ b/Source/web/painting/PaintAggregator.cpp
@@ -237,7 +237,7 @@ void PaintAggregator::invalidateRect(const IntRect& rect)
     // with all existing paints, which means that tracking the size of
     // paintRects at the time when popPendingUpdate() is called may mask
     // certain performance problems.
-    blink::Platform::current()->histogramCustomCounts("MPArch.RW_IntermediatePaintRectCount",
+    Platform::current()->histogramCustomCounts("MPArch.RW_IntermediatePaintRectCount",
                                           m_update.paintRects.size(), 1, 100, 50);
 }