Remove all blimp engine code

blimp/engine/browser/font_data_fetcher_impl.h

-// 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.
-
-#ifndef BLIMP_ENGINE_BROWSER_FONT_DATA_FETCHER_IMPL_H_
-#define BLIMP_ENGINE_BROWSER_FONT_DATA_FETCHER_IMPL_H_
-
-#include <string>
-
-#include "base/single_thread_task_runner.h"
-#include "base/threading/thread_checker.h"
-#include "blimp/engine/browser/font_data_fetcher.h"
-
-namespace blimp {
-namespace engine {
-
-// Implementation of fetching font data from files. File access is done on the
-// file thread.
-class FontDataFetcherImpl : public FontDataFetcher {
- public:
-  // |file_task_runner|: The task runner that will process all file access.
-  explicit FontDataFetcherImpl(
-      scoped_refptr<base::SingleThreadTaskRunner> file_task_runner);
-
-  ~FontDataFetcherImpl() override;
-
-  // FontDataFetcher implementation.
-  void FetchFontStream(const std::string& font_hash,
-                       const FontResponseCallback& callback) const override;
-
- private:
-  scoped_refptr<base::SingleThreadTaskRunner> file_task_runner_;
-
-  base::ThreadChecker thread_checker_;
-
-  DISALLOW_COPY_AND_ASSIGN(FontDataFetcherImpl);
-};
-
-}  // namespace engine
-}  // namespace blimp
-
-#endif  // BLIMP_ENGINE_BROWSER_FONT_DATA_FETCHER_IMPL_H_