Move base to DEPS

base/memory/discardable_memory_allocator.cc

-// Copyright 2015 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/discardable_memory_allocator.h"
-
-#include "base/logging.h"
-
-namespace base {
-namespace {
-
-DiscardableMemoryAllocator* g_allocator = nullptr;
-
-}  // namespace
-
-// static
-void DiscardableMemoryAllocator::SetInstance(
-    DiscardableMemoryAllocator* allocator) {
-  DCHECK(allocator);
-
-  // Make sure this function is only called once before the first call
-  // to GetInstance().
-  DCHECK(!g_allocator);
-
-  g_allocator = allocator;
-}
-
-// static
-DiscardableMemoryAllocator* DiscardableMemoryAllocator::GetInstance() {
-  DCHECK(g_allocator);
-  return g_allocator;
-}
-
-}  // namespace base