Move Partition Allocator into Chromium base.

third_party/WebKit/Source/platform/heap/PageMemory.cpp

 // Copyright 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.
 
 #include "platform/heap/PageMemory.h"
 
 #include "platform/heap/Heap.h"
 #include "wtf/AddressSanitizer.h"
 #include "wtf/Assertions.h"
 #include "wtf/Atomics.h"
-#include "wtf/allocator/PageAllocator.h"
 
 namespace blink {
 
 void MemoryRegion::release() {
   WTF::freePages(m_base, m_size);
 }
 
 bool MemoryRegion::commit() {
   WTF::recommitSystemPages(m_base, m_size);
   return WTF::setSystemPagesAccessible(m_base, m_size);
@@ skipping 155 matching lines @@
   size_t allocationSize = payloadSize + 2 * blinkGuardPageSize;
   PageMemoryRegion* pageMemoryRegion =
       PageMemoryRegion::allocateLargePage(allocationSize, regionTree);
   PageMemory* storage =
       setupPageMemoryInRegion(pageMemoryRegion, 0, payloadSize);
   RELEASE_ASSERT(storage->commit());
   return storage;
 }
 
 }  // namespace blink