Remove RefPtr<ScriptState> from PerformanceObserver

third_party/WebKit/Source/core/timing/PerformanceObserver.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/timing/PerformanceObserver.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/PerformanceObserverCallback.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/timing/PerformanceBase.h"
 #include "core/timing/PerformanceEntry.h"
 #include "core/timing/PerformanceObserverEntryList.h"
 #include "core/timing/PerformanceObserverInit.h"
 #include "platform/Timer.h"
 #include <algorithm>
 
 namespace blink {
 
 PerformanceObserver* PerformanceObserver::create(
-    ScriptState* scriptState,
+    ExecutionContext* executionContext,
     PerformanceBase* performance,
     PerformanceObserverCallback* callback) {
   ASSERT(isMainThread());
-  return new PerformanceObserver(scriptState, performance, callback);
+  return new PerformanceObserver(executionContext, performance, callback);
 }
 
-PerformanceObserver::PerformanceObserver(ScriptState* scriptState,
+PerformanceObserver::PerformanceObserver(ExecutionContext* executionContext,
                                          PerformanceBase* performance,
                                          PerformanceObserverCallback* callback)
-    : m_scriptState(scriptState),
+    : m_executionContext(executionContext),
       m_callback(this, callback),
       m_performance(performance),
       m_filterOptions(PerformanceEntry::Invalid),
       m_isRegistered(false) {}
 
 void PerformanceObserver::observe(const PerformanceObserverInit& observerInit,
                                   ExceptionState& exceptionState) {
   if (!m_performance) {
     exceptionState.throwTypeError(
         "Window may be destroyed? Performance target is invalid.");
@@ skipping 29 matching lines @@
 }
 
 void PerformanceObserver::enqueuePerformanceEntry(PerformanceEntry& entry) {
   ASSERT(isMainThread());
   m_performanceEntries.append(&entry);
   if (m_performance)
     m_performance->activateObserver(*this);
 }
 
 bool PerformanceObserver::shouldBeSuspended() const {
-  return m_scriptState->getExecutionContext() &&
-         m_scriptState->getExecutionContext()->activeDOMObjectsAreSuspended();
+  return m_executionContext->activeDOMObjectsAreSuspended();
 }
 
 void PerformanceObserver::deliver() {
   ASSERT(!shouldBeSuspended());
 
   if (m_performanceEntries.isEmpty())
     return;
 
   PerformanceEntryVector performanceEntries;
   performanceEntries.swap(m_performanceEntries);
   PerformanceObserverEntryList* entryList =
       new PerformanceObserverEntryList(performanceEntries);
   m_callback->call(this, entryList, this);
 }
 
 DEFINE_TRACE(PerformanceObserver) {
+  visitor->trace(m_executionContext);
   visitor->trace(m_callback);
   visitor->trace(m_performance);
   visitor->trace(m_performanceEntries);
 }
 
 DEFINE_TRACE_WRAPPERS(PerformanceObserver) {
   visitor->traceWrappers(m_callback);
 }
 
 }  // namespace blink