Reenable some heap verification and fix test to keep

test/cctest/test-alloc.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 17 matching lines @@
 #include "v8.h"
 #include "accessors.h"
 
 #include "cctest.h"
 
 
 using namespace v8::internal;
 
 
 static inline void SimulateFullSpace(PagedSpace* space) {
+  int old_linear_size = static_cast<int>(space->limit() - space->top());
+  space->Free(space->top(), old_linear_size);
   space->SetTop(space->limit(), space->limit());
   space->ResetFreeList();
   space->ClearStats();
 }
 
 
 static MaybeObject* AllocateAfterFailures() {
   static int attempts = 0;
   if (++attempts < 3) return Failure::RetryAfterGC();
   Heap* heap = Isolate::Current()->heap();
@@ skipping 178 matching lines @@
         blocks[index] = blocks.RemoveLast();
       } else {
         blocks.RemoveLast();
       }
     }
   }
 
   code_range->TearDown();
   delete code_range;
 }