Remove custom counts histogram from the blink API.

third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/dom/ScriptedIdleTaskController.h"
 
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/IdleRequestCallback.h"
 #include "core/dom/IdleRequestOptions.h"
 #include "core/inspector/InspectorTraceEvents.h"
+#include "platform/Histogram.h"
 #include "platform/Logging.h"
 #include "platform/TraceEvent.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebScheduler.h"
 #include "public/platform/WebTraceLocation.h"
 #include "wtf/CurrentTime.h"
 #include "wtf/Functional.h"
 
 namespace blink {
 
@@ skipping 93 matching lines @@
 }
 
 void ScriptedIdleTaskController::runCallback(CallbackId id, double deadlineSeconds, IdleDeadline::CallbackType callbackType)
 {
     ASSERT(!m_suspended);
     auto callback = m_callbacks.take(id);
     if (!callback)
         return;
 
     double allottedTimeMillis = std::max((deadlineSeconds - monotonicallyIncreasingTime()) * 1000, 0.0);
-    Platform::current()->histogramCustomCounts("WebCore.ScriptedIdleTaskController.IdleCallbackDeadline", allottedTimeMillis, 0, 50, 50);
+
+    DEFINE_STATIC_LOCAL(CustomCountHistogram, idleCallbackDeadlineHistogram, ("WebCore.ScriptedIdleTaskController.IdleCallbackDeadline", 0, 50, 50));
+    idleCallbackDeadlineHistogram.count(allottedTimeMillis);
 
     TRACE_EVENT1("devtools.timeline", "FireIdleCallback",
         "data", InspectorIdleCallbackFireEvent::data(executionContext(), id, allottedTimeMillis, callbackType == IdleDeadline::CallbackType::CalledByTimeout));
     callback->handleEvent(IdleDeadline::create(deadlineSeconds, callbackType));
 
     double overrunMillis = std::max((monotonicallyIncreasingTime() - deadlineSeconds) * 1000, 0.0);
-    Platform::current()->histogramCustomCounts("WebCore.ScriptedIdleTaskController.IdleCallbackOverrun", overrunMillis, 0, 10000, 50);
+
+    DEFINE_STATIC_LOCAL(CustomCountHistogram, idleCallbackOverrunHistogram, ("WebCore.ScriptedIdleTaskController.IdleCallbackOverrun", 0, 10000, 50));
+    idleCallbackOverrunHistogram.count(overrunMillis);
 }
 
 void ScriptedIdleTaskController::stop()
 {
     m_callbacks.clear();
 }
 
 void ScriptedIdleTaskController::suspend()
 {
     m_suspended = true;
@@ skipping 11 matching lines @@
         runCallback(id, monotonicallyIncreasingTime(), IdleDeadline::CallbackType::CalledByTimeout);
 
     // Repost idle tasks for any remaining callbacks.
     for (auto& callback : m_callbacks) {
         RefPtr<internal::IdleRequestCallbackWrapper> callbackWrapper = internal::IdleRequestCallbackWrapper::create(callback.key, this);
         m_scheduler->postIdleTask(BLINK_FROM_HERE, WTF::bind<double>(&internal::IdleRequestCallbackWrapper::idleTaskFired, callbackWrapper));
     }
 }
 
 } // namespace blink