[inspector] introduced stepIntoAsync for chained callbacks

src/inspector/v8-debugger-agent-impl.h

 // Copyright 2015 the V8 project 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 V8_INSPECTOR_V8DEBUGGERAGENTIMPL_H_
 #define V8_INSPECTOR_V8DEBUGGERAGENTIMPL_H_
 
 #include <vector>
 
 #include "src/base/macros.h"
@@ skipping 69 matching lines @@
       const String16& callFrameId,
       std::unique_ptr<protocol::Array<protocol::Debugger::CallFrame>>*
           newCallFrames,
       Maybe<protocol::Runtime::StackTrace>* asyncStackTrace) override;
   Response getScriptSource(const String16& scriptId,
                            String16* scriptSource) override;
   Response pause() override;
   Response resume() override;
   Response stepOver() override;
   Response stepInto() override;
+  Response stepIntoAsync() override;
   Response stepOut() override;
   Response setPauseOnExceptions(const String16& pauseState) override;
   Response evaluateOnCallFrame(
       const String16& callFrameId, const String16& expression,
       Maybe<String16> objectGroup, Maybe<bool> includeCommandLineAPI,
       Maybe<bool> silent, Maybe<bool> returnByValue,
       Maybe<bool> generatePreview,
       std::unique_ptr<protocol::Runtime::RemoteObject>* result,
       Maybe<protocol::Runtime::ExceptionDetails>*) override;
   Response setVariableValue(
@@ skipping 34 matching lines @@
   void didParseSource(std::unique_ptr<V8DebuggerScript>, bool success);
   void willExecuteScript(int scriptId);
   void didExecuteScript();
 
   bool isFunctionBlackboxed(const String16& scriptId,
                             const v8::debug::Location& start,
                             const v8::debug::Location& end);
 
   v8::Isolate* isolate() { return m_isolate; }
 
+  void asyncTaskCreated();
+  void asyncTaskStarted();
+  void asyncTaskFinished();
+
  private:
   void enableImpl();
 
   void schedulePauseOnNextStatementIfSteppingInto();
 
   Response currentCallFrames(
       std::unique_ptr<protocol::Array<protocol::Debugger::CallFrame>>*);
   std::unique_ptr<protocol::Runtime::StackTrace> currentAsyncStackTrace();
 
   void changeJavaScriptRecursionLevel(int step);
@@ skipping 45 matching lines @@
   std::unique_ptr<V8Regex> m_blackboxPattern;
   protocol::HashMap<String16, std::vector<std::pair<int, int>>>
       m_blackboxedPositions;
 
   DISALLOW_COPY_AND_ASSIGN(V8DebuggerAgentImpl);
 };
 
 }  // namespace v8_inspector
 
 #endif  // V8_INSPECTOR_V8DEBUGGERAGENTIMPL_H_