Remove more feature in product mode

runtime/vm/deopt_instructions.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_DEOPT_INSTRUCTIONS_H_
 #define VM_DEOPT_INSTRUCTIONS_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 #include "vm/code_generator.h"
@@ skipping 467 matching lines @@
 
   CpuRegisterSource ToCpuRegisterSource(const Location& loc);
   FpuRegisterSource ToFpuRegisterSource(const Location& loc,
                                       Location::Kind expected_stack_slot_kind);
 
   intptr_t FindOrAddObjectInTable(const Object& obj) const;
   intptr_t FindMaterialization(MaterializeObjectInstr* mat) const;
   intptr_t CalculateStackIndex(const Location& source_loc) const;
 
   intptr_t FrameSize() const {
-    return instructions_.length() - frame_start_;
+    ASSERT(frame_start_ != -1);
+    const intptr_t frame_size = instructions_.length() - frame_start_;
+    ASSERT(frame_size >= 0);
+    return frame_size;
   }
 
   void AddConstant(const Object& obj, intptr_t dest_index);
 
   Zone* zone() const { return zone_; }
 
   Zone* zone_;
 
   GrowableArray<DeoptInstr*> instructions_;
   const intptr_t num_args_;
@@ skipping 49 matching lines @@
       public BitField<intptr_t, ICData::DeoptReasonId, 0, 8> { };
   class FlagsField : public BitField<intptr_t, uint32_t, 8, 8> { };
 
  private:
   static const intptr_t kEntrySize = 3;
 };
 
 }  // namespace dart
 
 #endif  // VM_DEOPT_INSTRUCTIONS_H_