Refactor InspectorWebPerfAgent: update lifecycle management to be per Local Frame root; replace hea…

third_party/WebKit/Source/core/timing/PerformanceTest.cpp

 // Copyright 2016 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/Performance.h"
 
 #include "core/testing/DummyPageHolder.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
 class PerformanceTest : public ::testing::Test {
  protected:
   void SetUp() override {
     m_pageHolder = DummyPageHolder::create(IntSize(800, 600));
     m_pageHolder->document().setURL(KURL(KURL(), "https://example.com"));
     m_performance = Performance::create(&m_pageHolder->frame());
   }
 
-  bool hasLongTaskInspectorAgent() {
-    return m_performance->m_longTaskInspectorAgent;
-  }
+  bool observingLongTasks() { return m_performance->observingLongTasks(); }
 
   void addLongTaskObserver() {
     // simulate with filter options.
     m_performance->m_observerFilterOptions |= PerformanceEntry::LongTask;
   }
 
   void removeLongTaskObserver() {
     // simulate with filter options.
     m_performance->m_observerFilterOptions = PerformanceEntry::Invalid;
   }
 
   Persistent<Performance> m_performance;
   std::unique_ptr<DummyPageHolder> m_pageHolder;
 };
 
 TEST_F(PerformanceTest, LongTaskObserverInstrumentation) {
   m_performance->updateLongTaskInstrumentation();
-  EXPECT_FALSE(hasLongTaskInspectorAgent());
+  EXPECT_FALSE(observingLongTasks());
 
   // Adding LongTask observer (with filer option) enables instrumentation.
   addLongTaskObserver();
   m_performance->updateLongTaskInstrumentation();
-  EXPECT_TRUE(hasLongTaskInspectorAgent());
-
-  // While LongTask observer is present, updateLongTaskInstrumentation has no
-  // effect.
-  m_performance->updateLongTaskInstrumentation();
-  EXPECT_TRUE(hasLongTaskInspectorAgent());
+  EXPECT_TRUE(observingLongTasks());
 
   // Removing LongTask observer disables instrumentation.
   removeLongTaskObserver();
   m_performance->updateLongTaskInstrumentation();
-  EXPECT_FALSE(hasLongTaskInspectorAgent());
+  EXPECT_FALSE(observingLongTasks());
 }
 }