DBC: Fix reading locals out of a deopt frame.

runtime/vm/stack_frame.h

Index: runtime/vm/stack_frame.h
diff --git a/runtime/vm/stack_frame.h b/runtime/vm/stack_frame.h
index dac3e5fb714523dfb0f8bbaf14a9ddbfc7b3c1f1..741c3d39710fd6f97815a0ff2c10fddd65a0b418 100644
--- a/runtime/vm/stack_frame.h
+++ b/runtime/vm/stack_frame.h
@@ -336,6 +336,7 @@ class InlinedFunctionsIterator : public ValueObject {
 
   intptr_t index_;
   intptr_t num_materializations_;
+  intptr_t dest_frame_size_;
   Code& code_;
   TypedData& deopt_info_;
   Function& function_;
@@ -352,6 +353,12 @@ DART_FORCE_INLINE static uword LocalVarAddress(uword fp, intptr_t index) {
 }
 
 
+DART_FORCE_INLINE static intptr_t LocalVarIndex(intptr_t fp_offset,
+                                                intptr_t var_index) {
+  return fp_offset + var_index;
+}
+
+
 DART_FORCE_INLINE static uword ParamAddress(uword fp, intptr_t reverse_index) {
   return fp + (kParamEndSlotFromFp * kWordSize) + (reverse_index * kWordSize);
 }