Add a new QUIC platform API quic_aligned.h for the alignment macro definitions.

net/quic/core/quic_arena_scoped_ptr.h

 // Copyright (c) 2016 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.
 
 // unique_ptr-style pointer that stores values that may be from an arena. Takes
 // up the same storage as the platform's native pointer type. Takes ownership
 // of the value it's constructed with; if holding a value in an arena, and the
 // type has a non-trivial destructor, the arena must outlive the
 // QuicArenaScopedPtr. Does not support array overloads.
 
 #ifndef NET_QUIC_CORE_QUIC_ARENA_SCOPED_PTR_H_
 #define NET_QUIC_CORE_QUIC_ARENA_SCOPED_PTR_H_
 
 #include <cstdint>  // for uintptr_t
 
 #include "base/logging.h"
 #include "base/macros.h"
-#include "net/quic/core/quic_types.h"
+#include "net/quic/platform/api/quic_aligned.h"
 
 namespace net {
 
 template <typename T>
 class QuicArenaScopedPtr {
   static_assert(QUIC_ALIGN_OF(T*) > 1,
                 "QuicArenaScopedPtr can only store objects that are aligned to "
                 "greater than 1 byte.");
 
  public:
@@ skipping 171 matching lines @@
     case ConstructFrom::kArena:
       value_ = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(value_) |
                                        QuicArenaScopedPtr<T>::kFromArenaMask);
       break;
   }
 }
 
 }  // namespace net
 
 #endif  // NET_QUIC_CORE_QUIC_ARENA_SCOPED_PTR_H_