[inspector] store creation stack in current V8StackTraceImpl

src/inspector/v8-stack-trace-impl.h

 // Copyright 2016 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_V8STACKTRACEIMPL_H_
 #define V8_INSPECTOR_V8STACKTRACEIMPL_H_
 
 #include <vector>
 
 #include "src/base/macros.h"
 #include "src/inspector/protocol/Forward.h"
 #include "src/inspector/protocol/Runtime.h"
 
 #include "include/v8-inspector.h"
 
 namespace v8_inspector {
 
-class TracedValue;
 class V8Debugger;
 
 // Note: async stack trace may have empty top stack with non-empty tail to
-// indicate
-// that current native-only state had some async story.
+// indicate that current native-only state had some async story.
 // On the other hand, any non-top async stack is guaranteed to be non-empty.
 class V8StackTraceImpl final : public V8StackTrace {
  public:
   static const size_t maxCallStackSizeToCapture = 200;
 
   class Frame {
    public:
-    Frame();
     Frame(const String16& functionName, const String16& scriptId,
           const String16& scriptName, int lineNumber, int column = 0);
-    ~Frame();
+    ~Frame() = default;
 
     const String16& functionName() const { return m_functionName; }
     const String16& scriptId() const { return m_scriptId; }
     const String16& sourceURL() const { return m_scriptName; }
     int lineNumber() const { return m_lineNumber; }
     int columnNumber() const { return m_columnNumber; }
-    Frame clone() const;
 
    private:
     friend class V8StackTraceImpl;
     std::unique_ptr<protocol::Runtime::CallFrame> buildInspectorObject() const;
-    void toTracedValue(TracedValue*) const;
 
     String16 m_functionName;
     String16 m_scriptId;
     String16 m_scriptName;
     int m_lineNumber;
     int m_columnNumber;
   };
 
   static void setCaptureStackTraceForUncaughtExceptions(v8::Isolate*,
                                                         bool capture);
   static std::unique_ptr<V8StackTraceImpl> create(
       V8Debugger*, int contextGroupId, v8::Local<v8::StackTrace>,
       size_t maxStackSize, const String16& description = String16());
   static std::unique_ptr<V8StackTraceImpl> capture(
       V8Debugger*, int contextGroupId, size_t maxStackSize,
       const String16& description = String16());
 
   // This method drops the async chain. Use cloneImpl() instead.
   std::unique_ptr<V8StackTrace> clone() override;
   std::unique_ptr<V8StackTraceImpl> cloneImpl();
-  std::unique_ptr<protocol::Runtime::StackTrace> buildInspectorObjectForTail(
-      V8Debugger*) const;
+  static std::unique_ptr<protocol::Runtime::StackTrace>
+  buildInspectorObjectForTail(V8Debugger*);
   std::unique_ptr<protocol::Runtime::StackTrace> buildInspectorObjectImpl()
       const;
   ~V8StackTraceImpl() override;
 
   // V8StackTrace implementation.
   bool isEmpty() const override { return !m_frames.size(); };
   StringView topSourceURL() const override;
   int topLineNumber() const override;
   int topColumnNumber() const override;
   StringView topScriptId() const override;
   StringView topFunctionName() const override;
   std::unique_ptr<protocol::Runtime::API::StackTrace> buildInspectorObject()
       const override;
   std::unique_ptr<StringBuffer> toString() const override;
 
-  void setCreation(std::unique_ptr<V8StackTraceImpl> creation);
-
  private:
   V8StackTraceImpl(int contextGroupId, const String16& description,
                    std::vector<Frame>& frames,
-                   std::unique_ptr<V8StackTraceImpl> parent);
+                   std::unique_ptr<V8StackTraceImpl> parent,
+                   std::unique_ptr<V8StackTraceImpl> creation);
+
+  std::unique_ptr<protocol::Runtime::StackTrace> buildInspectorObjectImpl(
+      V8StackTraceImpl* creation) const;
 
   int m_contextGroupId;
   String16 m_description;
   std::vector<Frame> m_frames;
   std::unique_ptr<V8StackTraceImpl> m_parent;
   std::unique_ptr<V8StackTraceImpl> m_creation;
 
   DISALLOW_COPY_AND_ASSIGN(V8StackTraceImpl);
 };
 
 }  // namespace v8_inspector
 
 #endif  // V8_INSPECTOR_V8STACKTRACEIMPL_H_