[DevTools] Rework idle{Started,Finished} instrumentation.

third_party/WebKit/Source/core/inspector/ThreadDebugger.h

 // 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.
 
 #ifndef ThreadDebugger_h
 #define ThreadDebugger_h
 
 #include "core/CoreExport.h"
 #include "platform/v8_inspector/public/V8Debugger.h"
 #include "platform/v8_inspector/public/V8DebuggerClient.h"
 #include "wtf/Forward.h"
 
 #include <v8.h>
 
 namespace blink {
 
 class ConsoleMessage;
 class WorkerThread;
 
 class CORE_EXPORT ThreadDebugger : public V8DebuggerClient {
     WTF_MAKE_NONCOPYABLE(ThreadDebugger);
 public:
     explicit ThreadDebugger(v8::Isolate*);
     ~ThreadDebugger() override;
 
     static void willExecuteScript(v8::Isolate*, int scriptId);
     static void didExecuteScript(v8::Isolate*);
+    static void idleStarted(v8::Isolate*);
+    static void idleFinished(v8::Isolate*);
 
     // V8DebuggerClient implementation.
     void eventListeners(v8::Local<v8::Value>, V8EventListenerInfoList&) override;
     String16 valueSubtype(v8::Local<v8::Value>) override;
     bool formatAccessorsAsProperties(v8::Local<v8::Value>) override;
     bool isExecutionAllowed() override;
     double currentTimeMS() override;
     void reportMessageToConsole(v8::Local<v8::Context>, MessageType, MessageLevel, const String16& message, const v8::FunctionCallbackInfo<v8::Value>* arguments, unsigned skipArgumentCount, int maxStackSize) final;
     void consoleTime(const String16& title) override;
     void consoleTimeEnd(const String16& title) override;
     void consoleTimeStamp(const String16& title) override;
 
     V8Debugger* debugger() const { return m_debugger.get(); }
     virtual bool isWorker() { return true; }
 protected:
     virtual void reportMessageToConsole(v8::Local<v8::Context>, ConsoleMessage*) = 0;
 
     v8::Isolate* m_isolate;
     OwnPtr<V8Debugger> m_debugger;
 };
 
 } // namespace blink
 
 #endif // ThreadDebugger_h