[inspector] added Debugger.getPossibleBreakpoints method

src/debug/debug.h

Index: src/debug/debug.h
diff --git a/src/debug/debug.h b/src/debug/debug.h
index 30cbe77f8b37aa71895d49b54c60c29fe29cd88c..8f4a3efba4fcab0c51f6780a0d1a67512646c800 100644
--- a/src/debug/debug.h
+++ b/src/debug/debug.h
@@ -461,6 +461,8 @@ class Debug {
   void ClearStepOut();
 
   bool PrepareFunctionForBreakPoints(Handle<SharedFunctionInfo> shared);
+  bool GetPossibleBreakpoints(Handle<Script> script, int start_position,
+                              int end_position, std::vector<int>& positions);
 
   void RecordAsyncFunction(Handle<JSGeneratorObject> generator_object);
 
@@ -617,6 +619,9 @@ class Debug {
   // Find the closest source position for a break point for a given position.
   int FindBreakablePosition(Handle<DebugInfo> debug_info, int source_position,
                             BreakPositionAlignment alignment);
+  bool FindBreakablePositions(Handle<DebugInfo> debug_info, int start_offset,
+                              int end_offset, BreakPositionAlignment alignment,
+                              std::vector<int>& offsets);
   // Instrument code to break at break points.
   void ApplyBreakPoints(Handle<DebugInfo> debug_info);
   // Clear code from instrumentation.