[WIP] do something :-)

Source/platform/heap/HeapTest.cpp

 /*
  * Copyright (C) 2013 Google Inc. 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
@@ skipping 25 matching lines @@
 #include "platform/heap/Heap.h"
 #include "platform/heap/HeapLinkedStack.h"
 #include "platform/heap/HeapTerminatedArrayBuilder.h"
 #include "platform/heap/SafePoint.h"
 #include "platform/heap/ThreadState.h"
 #include "platform/heap/Visitor.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebTraceLocation.h"
 #include "wtf/HashTraits.h"
 #include "wtf/LinkedHashSet.h"
+#include "wtf/SizeAssertions.h"
 
 #include <gtest/gtest.h>
 
 namespace blink {
 
 static void preciselyCollectGarbage()
 {
     Heap::collectGarbage(ThreadState::NoHeapPointersOnStack, ThreadState::GCWithSweep, Heap::ForcedGC);
 }
 
@@ skipping 25 matching lines @@
 
     IntWrapper(int x) : m_x(x) { }
 
 private:
     IntWrapper();
     int m_x;
 };
 static_assert(WTF::NeedsTracing<IntWrapper>::value, "NeedsTracing macro failed to recognize trace method.");
 
 #if !ENABLE(GC_PROFILING)
-struct SameSizeAsPersistent {
-    void* m_pointer[4];
-};
-
-static_assert(sizeof(Persistent<IntWrapper>) <= sizeof(SameSizeAsPersistent), "Persistent handle should stay small");
+ASSERT_SIZE(Persistent<IntWrapper>, 16, 16);
 #endif
 
 class ThreadMarker {
 public:
     ThreadMarker() : m_creatingThread(reinterpret_cast<ThreadState*>(0)), m_num(0) { }
     ThreadMarker(unsigned i) : m_creatingThread(ThreadState::current()), m_num(i) { }
     ThreadMarker(WTF::HashTableDeletedValueType deleted) : m_creatingThread(reinterpret_cast<ThreadState*>(-1)), m_num(0) { }
     ~ThreadMarker()
     {
         EXPECT_TRUE((m_creatingThread == ThreadState::current())
@@ skipping 6324 matching lines @@
     {
         SafePointAwareMutexLocker recursiveMutexLocker(recursiveMutex());
         EXPECT_EQ(1, DestructorLockingObject::s_destructorCalls);
     }
 
     wakeWorkerThread();
     parkMainThread();
 }
 
 } // namespace blink