Replace blink::WebDiscardableMemory with base::DiscardableMemory.

content/child/web_discardable_memory_impl.cc

-// Copyright 2014 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 "content/child/web_discardable_memory_impl.h"
-
-#include <utility>
-
-#include "base/memory/discardable_memory.h"
-#include "base/memory/discardable_memory_allocator.h"
-#include "third_party/WebKit/public/platform/WebProcessMemoryDump.h"
-#include "third_party/WebKit/public/platform/WebString.h"
-
-namespace content {
-
-WebDiscardableMemoryImpl::~WebDiscardableMemoryImpl() {}
-
-// static
-scoped_ptr<WebDiscardableMemoryImpl>
-WebDiscardableMemoryImpl::CreateLockedMemory(size_t size) {
-  return make_scoped_ptr(new WebDiscardableMemoryImpl(
-      base::DiscardableMemoryAllocator::GetInstance()
-          ->AllocateLockedDiscardableMemory(size)));
-}
-
-bool WebDiscardableMemoryImpl::lock() {
-  return discardable_->Lock();
-}
-
-void WebDiscardableMemoryImpl::unlock() {
-  discardable_->Unlock();
-}
-
-void* WebDiscardableMemoryImpl::data() {
-  return discardable_->data();
-}
-
-blink::WebMemoryAllocatorDump*
-WebDiscardableMemoryImpl::createMemoryAllocatorDump(
-    const blink::WebString& name,
-    blink::WebProcessMemoryDump* wpmd) const {
-  return wpmd->createDiscardableMemoryAllocatorDump(
-      name.utf8(), discardable_.get());
-}
-
-WebDiscardableMemoryImpl::WebDiscardableMemoryImpl(
-    scoped_ptr<base::DiscardableMemory> memory)
-    : discardable_(std::move(memory)) {}
-
-}  // namespace content