[debugger] fix debug-evaluate wrt shadowed context var.

src/ast/scopeinfo.cc

Index: src/ast/scopeinfo.cc
diff --git a/src/ast/scopeinfo.cc b/src/ast/scopeinfo.cc
index 668879fe5129f63140dfee72ca9d64bad05d062f..bc954852643284a29d03737296430eccfd79fdea 100644
--- a/src/ast/scopeinfo.cc
+++ b/src/ast/scopeinfo.cc
@@ -377,6 +377,16 @@ bool ScopeInfo::HasAllocatedReceiver() {
 }
 
 
+bool ScopeInfo::HasContextAllocatedReceiver() {
+  if (length() > 0) {
+    VariableAllocationInfo allocation = ReceiverVariableField::decode(Flags());
+    return allocation == CONTEXT;
+  } else {
+    return false;
+  }
+}
+
+
 bool ScopeInfo::HasNewTarget() { return HasNewTargetField::decode(Flags()); }