[inspector] introduced stepIntoAsync for chained callbacks

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

Index: src/inspector/v8-debugger-agent-impl.h
diff --git a/src/inspector/v8-debugger-agent-impl.h b/src/inspector/v8-debugger-agent-impl.h
index 41a18a8d3688e2da939d6928b6e95cb567d4f25b..4bde2a2ac2367df540abde4eb610f55c9df74af2 100644
--- a/src/inspector/v8-debugger-agent-impl.h
+++ b/src/inspector/v8-debugger-agent-impl.h
@@ -87,6 +87,7 @@ class V8DebuggerAgentImpl : public protocol::Debugger::Backend {
   Response resume() override;
   Response stepOver() override;
   Response stepInto() override;
+  Response stepIntoAsync() override;
   Response stepOut() override;
   Response setPauseOnExceptions(const String16& pauseState) override;
   Response evaluateOnCallFrame(
@@ -121,6 +122,9 @@ class V8DebuggerAgentImpl : public protocol::Debugger::Backend {
   void cancelPauseOnNextStatement();
   void breakProgram(const String16& breakReason,
                     std::unique_ptr<protocol::DictionaryValue> data);
+  void breakProgramIfSteppingInto(
+      const String16& breakReason,
+      std::unique_ptr<protocol::DictionaryValue> data);
   void breakProgramOnException(const String16& breakReason,
                                std::unique_ptr<protocol::DictionaryValue> data);
 
@@ -146,8 +150,6 @@ class V8DebuggerAgentImpl : public protocol::Debugger::Backend {
  private:
   void enableImpl();
 
-  void schedulePauseOnNextStatementIfSteppingInto();
-
   Response currentCallFrames(
       std::unique_ptr<protocol::Array<protocol::Debugger::CallFrame>>*);
   std::unique_ptr<protocol::Runtime::StackTrace> currentAsyncStackTrace();