Remove custom counts histogram from the blink API.

third_party/WebKit/Source/platform/heap/Heap.cpp

Index: third_party/WebKit/Source/platform/heap/Heap.cpp
diff --git a/third_party/WebKit/Source/platform/heap/Heap.cpp b/third_party/WebKit/Source/platform/heap/Heap.cpp
index 6bcd260dbd920858993e47143f2f4882ba77f616..1b25eaf1ab2a3b339b19f36b246fb659b13363f1 100644
--- a/third_party/WebKit/Source/platform/heap/Heap.cpp
+++ b/third_party/WebKit/Source/platform/heap/Heap.cpp
@@ -30,6 +30,7 @@
 
 #include "platform/heap/Heap.h"
 
+#include "platform/Histogram.h"
 #include "platform/ScriptForbiddenScope.h"
 #include "platform/TraceEvent.h"
 #include "platform/heap/BlinkGCMemoryDumpProvider.h"
@@ -111,7 +112,8 @@ public:
         double startTime = WTF::currentTimeMS();
         bool allParked = gcType != BlinkGC::ThreadTerminationGC && ThreadState::stopThreads();
         double timeForStoppingThreads = WTF::currentTimeMS() - startTime;
-        Platform::current()->histogramCustomCounts("BlinkGC.TimeForStoppingThreads", timeForStoppingThreads, 1, 1000, 50);
+        DEFINE_THREAD_SAFE_STATIC_LOCAL(CustomCountHistogram, timeToStopThreadsHistogram, new CustomCountHistogram("BlinkGC.TimeForStoppingThreads", 1, 1000, 50));
+        timeToStopThreadsHistogram.count(timeForStoppingThreads);
 
         if (m_state->isMainThread())
             TRACE_EVENT_SET_NONCONST_SAMPLING_STATE(samplingState);
@@ -452,9 +454,12 @@ void Heap::collectGarbage(BlinkGC::StackState stackState, BlinkGC::GCType gcType
     dataLogF("Heap::collectGarbage (gcReason=%s, lazySweeping=%d, time=%.1lfms)\n", gcReasonString(reason), gcType == BlinkGC::GCWithoutSweep, markingTimeInMilliseconds);
 #endif
 
-    Platform::current()->histogramCustomCounts("BlinkGC.CollectGarbage", markingTimeInMilliseconds, 0, 10 * 1000, 50);
-    Platform::current()->histogramCustomCounts("BlinkGC.TotalObjectSpace", Heap::allocatedObjectSize() / 1024, 0, 4 * 1024 * 1024, 50);
-    Platform::current()->histogramCustomCounts("BlinkGC.TotalAllocatedSpace", Heap::allocatedSpace() / 1024, 0, 4 * 1024 * 1024, 50);
+    DEFINE_THREAD_SAFE_STATIC_LOCAL(CustomCountHistogram, markingTimeHistogram, new CustomCountHistogram("BlinkGC.CollectGarbage", 0, 10 * 1000, 50));
+    markingTimeHistogram.count(markingTimeInMilliseconds);
+    DEFINE_THREAD_SAFE_STATIC_LOCAL(CustomCountHistogram, totalObjectSpaceHistogram, new CustomCountHistogram("BlinkGC.TotalObjectSpace", 0, 4 * 1024 * 1024, 50));
+    totalObjectSpaceHistogram.count(Heap::allocatedObjectSize() / 1024);
+    DEFINE_THREAD_SAFE_STATIC_LOCAL(CustomCountHistogram, totalAllocatedSpaceHistogram, new CustomCountHistogram("BlinkGC.TotalAllocatedSpace", 0, 4 * 1024 * 1024, 50));
+    totalAllocatedSpaceHistogram.count(Heap::allocatedSpace() / 1024);
     Platform::current()->histogramEnumeration("BlinkGC.GCReason", reason, BlinkGC::NumberOfGCReason);
     Heap::reportMemoryUsageHistogram();
     WTF::Partitions::reportMemoryUsageHistogram();
@@ -559,7 +564,8 @@ void Heap::globalWeakProcessing(Visitor* visitor)
     ASSERT(s_markingStack->isEmpty());
 
     double timeForGlobalWeakProcessing = WTF::currentTimeMS() - startTime;
-    Platform::current()->histogramCustomCounts("BlinkGC.TimeForGlobalWeakPrcessing", timeForGlobalWeakProcessing, 1, 10 * 1000, 50);
+    DEFINE_THREAD_SAFE_STATIC_LOCAL(CustomCountHistogram, globalWeakTimeHistogram, new CustomCountHistogram("BlinkGC.TimeForGlobalWeakPrcessing", 1, 10 * 1000, 50));
+    globalWeakTimeHistogram.count(timeForGlobalWeakProcessing);
 }
 
 void Heap::collectAllGarbage()