replace COMPILE_ASSERT with static_assert in public/platform/

public/platform/WebPrivatePtr.h

 /*
  * Copyright (C) 2010 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 120 matching lines @@
     void assign(const PassRefPtrWillBeRawPtr<T>& val) { PtrStorageImpl<T, GarbageCollectedLifetime>::assign(val.get()); }
 
     void assign(const PtrStorageImpl& other) { PtrStorageImpl<T, GarbageCollectedLifetime>::assign(other.get()); }
 };
 
 template<typename T>
 class PtrStorage : public PtrStorageImpl<T, LifetimeOf<T>::value> {
 public:
     static PtrStorage& fromSlot(void** slot)
     {
-        COMPILE_ASSERT(sizeof(PtrStorage) == sizeof(void*), PtrStorage_must_be_pointer_size);
+        static_assert(sizeof(PtrStorage) == sizeof(void*), "PtrStorage must be the size of a pointer");
         return *reinterpret_cast<PtrStorage*>(slot);
     }
 
     static const PtrStorage& fromSlot(void* const* slot)
     {
-        COMPILE_ASSERT(sizeof(PtrStorage) == sizeof(void*), PtrStorage_must_be_pointer_size);
+        static_assert(sizeof(PtrStorage) == sizeof(void*), "PtrStorage must be the size of a pointer");
         return *reinterpret_cast<const PtrStorage*>(slot);
     }
 
 private:
     // Prevent construction via normal means.
     PtrStorage();
     PtrStorage(const PtrStorage&);
 };
 #endif
 
@@ skipping 103 matching lines @@
     // Disable the copy constructor; classes that contain a WebPrivatePtr
     // should implement their copy constructor using assign().
     WebPrivatePtr(const WebPrivatePtr<T>&);
 
     void* m_storage;
 };
 
 } // namespace blink
 
 #endif