Allow assertions to be enabled in Blink Release builds.

Source/wtf/TerminatedArrayBuilder.h

 // Copyright 2014 The Chromium 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 TerminatedArrayBuilder_h
 #define TerminatedArrayBuilder_h
 
 #include "wtf/OwnPtr.h"
 
 namespace WTF {
 
@@ skipping 37 matching lines @@
     typename ArrayType<T>::Allocator::PassPtr release()
     {
         RELEASE_ASSERT(m_count == m_capacity);
         if (m_array)
             m_array->at(m_count - 1).setLastInArray(true);
         assertValid();
         return m_array.release();
     }
 
 private:
-#ifndef NDEBUG
+#if ENABLE(ASSERT)
     void assertValid()
     {
         for (size_t i = 0; i < m_count; ++i) {
             bool isLastInArray = (i + 1 == m_count);
             ASSERT(m_array->at(i).isLastInArray() == isLastInArray);
         }
     }
 #else
     void assertValid() { }
 #endif
 
     typename ArrayType<T>::Allocator::Ptr m_array;
     size_t m_count;
     size_t m_capacity;
 };
 
 } // namespace WTF
 
 using WTF::TerminatedArrayBuilder;
 
 #endif // TerminatedArrayBuilder_h