[inspector] implemented blackboxing inside v8

src/debug/debug-interface.h

Index: src/debug/debug-interface.h
diff --git a/src/debug/debug-interface.h b/src/debug/debug-interface.h
index 127ce66caf6247a1090506197048a14c46c78227..5edea5be597f02c96d9c59249d770a3b81fbca2f 100644
--- a/src/debug/debug-interface.h
+++ b/src/debug/debug-interface.h
@@ -86,13 +86,11 @@ void ChangeBreakOnException(Isolate* isolate, ExceptionBreakState state);
 enum StepAction {
   StepOut = 0,   // Step out of the current function.
   StepNext = 1,  // Step to the next statement in the current function.
-  StepIn = 2,    // Step into new functions invoked or the next statement
+  StepIn = 2     // Step into new functions invoked or the next statement
                  // in the current function.
-  StepFrame = 3  // Step into a new frame or return to previous frame.
 };
 
 void PrepareStep(Isolate* isolate, StepAction action);
-void ClearStepping(Isolate* isolate);
 
 /**
  * Out-of-memory callback function.
@@ -126,6 +124,7 @@ class Script {
   bool GetPossibleBreakpoints(const debug::Location& start,
                               const debug::Location& end,
                               std::vector<debug::Location>* locations) const;
+  void BlackboxStateChanged() const;
 
  private:
   int GetSourcePosition(const debug::Location& location) const;
@@ -165,6 +164,15 @@ class DebugEventListener {
 
 void SetDebugEventListener(Isolate* isolate, DebugEventListener* listener);
 
+typedef std::function<bool(v8::Local<debug::Script> script,
+                           const debug::Location& start,
+                           const debug::Location& end, void* data)>
+    IsBlackboxedCallback;
+void SetIsBlackboxedCallback(Isolate* isolate, IsBlackboxedCallback callback,
+                             void* data);
+
+bool HasUserFrameOnStack(Isolate* isolate);
+
 }  // namespace debug
 }  // namespace v8