Debug: support breakpoints set in the middle of statement

src/debug.h

Index: src/debug.h
diff --git a/src/debug.h b/src/debug.h
index 467acb93e81eb130372a36eb2c4a873e00302a96..f7e94f57095c655dd07477f5d019bad9c751bb3b 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -90,7 +90,7 @@ class BreakLocationIterator {
   void Next();
   void Next(int count);
   void FindBreakLocationFromAddress(Address pc);
-  void FindBreakLocationFromPosition(int position);
+  void FindBreakLocationFromPosition(int position, bool statement_alighned);
   void Reset();
   bool Done() const;
   void SetBreakPoint(Handle<Object> break_point_object);
@@ -240,7 +240,8 @@ class Debug {
                      int* source_position);
   bool SetBreakPointForScript(Handle<Script> script,
                               Handle<Object> break_point_object,
-                              int* source_position);
+                              int* source_position,
+                              bool statement_alighned);
   void ClearBreakPoint(Handle<Object> break_point_object);
   void ClearAllBreakPoints();
   void FloodWithOneShot(Handle<JSFunction> function);