Revert "Revert of Remove font cache code (patchset #3 id:40001 of https://codereview.chromium.org/1…

chrome/utility/font_cache_handler_win.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 "chrome/utility/font_cache_handler_win.h"
-
-#include "base/task_runner_util.h"
-#include "base/threading/thread.h"
-#include "chrome/common/chrome_utility_messages.h"
-#include "content/public/common/dwrite_font_platform_win.h"
-#include "content/public/utility/utility_thread.h"
-
-FontCacheHandler::FontCacheHandler() {
-}
-
-FontCacheHandler::~FontCacheHandler() {
-}
-
-bool FontCacheHandler::OnMessageReceived(const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(FontCacheHandler, message)
-    IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_BuildDirectWriteFontCache,
-                        OnBuildFontCache)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-void FontCacheHandler::OnBuildFontCache(const base::FilePath& full_path) {
-  DCHECK(!cache_thread_);
-
-  utility_task_runner_ = base::MessageLoop::current()->task_runner();
-
-  // Create worker thread for building font cache.
-  cache_thread_.reset(new base::Thread("font_cache_thread"));
-  if (!cache_thread_->Start()) {
-    NOTREACHED();
-    return;
-  }
-  cache_thread_->message_loop()->PostTask(
-      FROM_HERE, base::Bind(&FontCacheHandler::StartBuildingFontCache,
-                            base::Unretained(this),
-                            full_path));
-}
-
-void FontCacheHandler::StartBuildingFontCache(const base::FilePath& full_path) {
-  content::BuildFontCache(full_path);
-  utility_task_runner_->PostTask(FROM_HERE,
-                                 base::Bind(&FontCacheHandler::Cleanup,
-                                            base::Unretained(this)));
-}
-
-void FontCacheHandler::Cleanup() {
-  cache_thread_.reset();
-  content::UtilityThread::Get()->ReleaseProcessIfNeeded();
-}