[debugger] implement inspector-facing API for code coverage.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index d7a47cf2c91924bb84cea7efc44d97af66c39fcc..a0073c2a9d3bf30c6e60c054f6987884b32dd2bf 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6694,10 +6694,8 @@ class Script: public Struct {
   // initializes the line ends array, avoiding expensive recomputations.
   // The non-static version is not allocating and safe for unhandlified
   // callsites.
-  V8_EXPORT_PRIVATE static bool GetPositionInfo(Handle<Script> script,
-                                                int position,
-                                                PositionInfo* info,
-                                                OffsetFlag offset_flag);
+  static bool GetPositionInfo(Handle<Script> script, int position,
+                              PositionInfo* info, OffsetFlag offset_flag);
   bool GetPositionInfo(int position, PositionInfo* info,
                        OffsetFlag offset_flag) const;