Removing blink::prefix

Source/core/timing/PerformanceUserTiming.cpp

Index: Source/core/timing/PerformanceUserTiming.cpp
diff --git a/Source/core/timing/PerformanceUserTiming.cpp b/Source/core/timing/PerformanceUserTiming.cpp
index f9ca90dc7598401380cbdc242c54eb1d2422886c..ecaf7ebf9ec770d659eca9088ec5a2b4b66bb572 100644
--- a/Source/core/timing/PerformanceUserTiming.cpp
+++ b/Source/core/timing/PerformanceUserTiming.cpp
@@ -109,7 +109,7 @@ void UserTiming::mark(const String& markName, ExceptionState& exceptionState)
     TRACE_EVENT_COPY_MARK("blink.user_timing", markName.utf8().data());
     double startTime = m_performance->now();
     insertPerformanceEntry(m_marksMap, PerformanceMark::create(markName, startTime));
-    blink::Platform::current()->histogramCustomCounts("PLT.UserTiming_Mark", static_cast<int>(startTime), 0, 600000, 100);
+    Platform::current()->histogramCustomCounts("PLT.UserTiming_Mark", static_cast<int>(startTime), 0, 600000, 100);
 }
 
 void UserTiming::clearMarks(const String& markName)
@@ -167,7 +167,7 @@ void UserTiming::measure(const String& measureName, const String& startMark, con
 
     insertPerformanceEntry(m_measuresMap, PerformanceMeasure::create(measureName, startTime, endTime));
     if (endTime >= startTime)
-        blink::Platform::current()->histogramCustomCounts("PLT.UserTiming_MeasureDuration", static_cast<int>(endTime - startTime), 0, 600000, 100);
+        Platform::current()->histogramCustomCounts("PLT.UserTiming_MeasureDuration", static_cast<int>(endTime - startTime), 0, 600000, 100);
 }
 
 void UserTiming::clearMeasures(const String& measureName)