Revert 147988 - Upgrade AlignedMemory to support dynamic allocations.

base/memory/aligned_memory.cc

-// 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.
-
-#include "base/memory/aligned_memory.h"
-
-#include "base/logging.h"
-
-#if defined(OS_ANDROID) || defined(OS_NACL)
-#include <malloc.h>
-#endif
-
-namespace base {
-
-void* AlignedAlloc(size_t size, size_t alignment) {
-  DCHECK_GT(size, 0U);
-  DCHECK_EQ(alignment & (alignment - 1), 0U);
-  DCHECK_EQ(alignment % sizeof(void*), 0U);
-  void* ptr = NULL;
-#if defined(COMPILER_MSVC)
-  ptr = _aligned_malloc(size, alignment);
-// Both Android and NaCl technically support posix_memalign(), but do not expose
-// it in the current version of the library headers used by Chrome.  Luckily,
-// memalign() on both platforms returns pointers which can safely be used with
-// free(), so we can use it instead.  Issues filed with each project for docs:
-// http://code.google.com/p/android/issues/detail?id=35391
-// http://code.google.com/p/chromium/issues/detail?id=138579
-#elif defined(OS_ANDROID) || defined(OS_NACL)
-  ptr = memalign(alignment, size);
-#else
-  if (posix_memalign(&ptr, alignment, size))
-    ptr = NULL;
-#endif
-  // Since aligned allocations may fail for non-memory related reasons, force a
-  // crash if we encounter a failed allocation; maintaining consistent behavior
-  // with a normal allocation failure in Chrome.
-  if (!ptr) {
-    DLOG(ERROR) << "If you crashed here, your aligned allocation is incorrect: "
-                << "size=" << size << ", alignment=" << alignment;
-    CHECK(false);
-  }
-  // Sanity check alignment just to be safe.
-  DCHECK_EQ(reinterpret_cast<uintptr_t>(ptr) & (alignment - 1), 0U);
-  return ptr;
-}
-
-}  // namespace base