DevTools: support all handlers that end up with function call in perfmonitor.

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

Index: third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.cpp
diff --git a/third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.cpp b/third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.cpp
index dc267a3db883c18bb41b4eb12ab04be6bd339521..5072fc19349d6194020c926d2d77836bcd2e88b3 100644
--- a/third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.cpp
+++ b/third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.cpp
@@ -7,6 +7,7 @@
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/IdleRequestCallback.h"
 #include "core/dom/IdleRequestOptions.h"
+#include "core/frame/PerformanceMonitor.h"
 #include "core/inspector/InspectorTraceEvents.h"
 #include "platform/Histogram.h"
 #include "platform/tracing/TraceEvent.h"
@@ -169,6 +170,8 @@ void ScriptedIdleTaskController::runCallback(
       ("WebCore.ScriptedIdleTaskController.IdleCallbackDeadline", 0, 50, 50));
   idleCallbackDeadlineHistogram.count(allottedTimeMillis);
 
+  PerformanceMonitor::HandlerCall handlerCall(getExecutionContext(),
+                                              "requestIdleCallback", true);
   TRACE_EVENT1(
       "devtools.timeline", "FireIdleCallback", "data",
       InspectorIdleCallbackFireEvent::data(