Add support for enabling DCHECKs in release mode

src/frames.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_FRAMES_H_
 #define V8_FRAMES_H_
 
 #include "src/allocation.h"
 #include "src/handles.h"
 #include "src/safepoint-table.h"
@@ skipping 318 matching lines @@
   static void PrintIndex(StringStream* accumulator,
                          PrintMode mode,
                          int index);
 
   // Get the top handler from the current stack iterator.
   inline StackHandler* top_handler() const;
 
   // Compute the stack frame type for the given state.
   static Type ComputeType(const StackFrameIteratorBase* iterator, State* state);
 
-#ifdef DEBUG
+#if DCHECK_IS_ON
   bool can_access_heap_objects() const;
 #endif
 
  private:
   const StackFrameIteratorBase* iterator_;
   Isolate* isolate_;
   State state_;
 
   static ReturnAddressLocationResolver return_address_location_resolver_;
 
@@ skipping 587 matching lines @@
 };
 
 
 // Reads all frames on the current stack and copies them into the current
 // zone memory.
 Vector<StackFrame*> CreateStackMap(Isolate* isolate, Zone* zone);
 
 } }  // namespace v8::internal
 
 #endif  // V8_FRAMES_H_