[wasm] prototype for breakpoint support.

src/debug/debug-scopes.cc

Index: src/debug/debug-scopes.cc
diff --git a/src/debug/debug-scopes.cc b/src/debug/debug-scopes.cc
index 82fd1937ba2afb6b961a887cce32a2e6a4cfb368..e1d4487b275da273580c0eb028f2d5ebb1c24d1b 100644
--- a/src/debug/debug-scopes.cc
+++ b/src/debug/debug-scopes.cc
@@ -58,10 +58,9 @@ ScopeIterator::ScopeIterator(Isolate* isolate, FrameInspector* frame_inspector,
     // inspect the function scope.
     // This can only happen if we set a break point inside right before the
     // return, which requires a debug info to be available.
-    Handle<DebugInfo> debug_info(shared_info->GetDebugInfo());
 
     // Find the break point where execution has stopped.
-    BreakLocation location = BreakLocation::FromFrame(debug_info, GetFrame());
+    BreakLocation location = BreakLocation::FromFrame(GetFrame());
 
     ignore_nested_scopes = location.IsReturn();
   }