Upgrade AlignedMemory to support dynamic allocations.

base/lazy_instance.h

 // Copyright (c) 2012 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.
 
 // The LazyInstance<Type, Traits> class manages a single instance of Type,
 // which will be lazily created on the first time it's accessed.  This class is
 // useful for places you would normally use a function-level static, but you
 // need to have guaranteed thread-safety.  The Type constructor will only ever
 // be called once, even if two threads are racing to create the object.  Get()
 // and Pointer() will always return the same, completely initialized instance.
@@ skipping 169 matching lines @@
         return p == instance();
     }
   }
 
   // Effectively private: member data is only public to allow the linker to
   // statically initialize it and to maintain a POD class. DO NOT USE FROM
   // OUTSIDE THIS CLASS.
 
   subtle::AtomicWord private_instance_;
   // Preallocated space for the Type instance.
-  base::AlignedMemory<sizeof(Type), ALIGNOF(Type)> private_buf_;
+  base::AlignedMemory<ALIGNOF(Type), sizeof(Type)> private_buf_;
 
  private:
   Type* instance() {
     return reinterpret_cast<Type*>(subtle::NoBarrier_Load(&private_instance_));
   }
 
   // Adapter function for use with AtExit.  This should be called single
   // threaded, so don't synchronize across threads.
   // Calling OnExit while the instance is in use by other threads is a mistake.
   static void OnExit(void* lazy_instance) {
     LazyInstance<Type, Traits>* me =
         reinterpret_cast<LazyInstance<Type, Traits>*>(lazy_instance);
     Traits::Delete(me->instance());
     subtle::NoBarrier_Store(&me->private_instance_, 0);
   }
 };
 
 }  // namespace base
 
 #endif  // BASE_LAZY_INSTANCE_H_