Revert of Sandbox html_viewer on Linux.

components/font_service/public/cpp/font_service_thread.h

-// 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.
-
-#ifndef COMPONENTS_FONT_SERVICE_PUBLIC_CPP_FONT_SERVICE_THREAD_H_
-#define COMPONENTS_FONT_SERVICE_PUBLIC_CPP_FONT_SERVICE_THREAD_H_
-
-#include "base/files/file.h"
-#include "base/threading/thread.h"
-#include "components/font_service/public/interfaces/font_service.mojom.h"
-#include "third_party/skia/include/core/SkStream.h"
-#include "third_party/skia/include/core/SkTypeface.h"
-#include "third_party/skia/include/ports/SkFontConfigInterface.h"
-
-namespace font_service {
-namespace internal {
-
-class MappedFontFile;
-
-// The thread which services font requests.
-//
-// The SkFontConfigInterface is a global singleton which can be accessed from
-// multiple threads. However, mojo pipes are bound to a single thread. Because
-// of this mismatch, we create a thread which owns the mojo pipe, sends and
-// receives messages. The multiple threads which call through FontLoader class
-// do blocking message calls to this thread.
-class FontServiceThread : public base::Thread,
-                          public base::RefCountedThreadSafe<FontServiceThread> {
- public:
-  explicit FontServiceThread(FontServicePtr font_service);
-
-  // These methods are proxies which run on your thread, post a blocking task
-  // to the FontServiceThread, and wait on an event signaled from the callback.
-  bool MatchFamilyName(const char family_name[],
-                       SkTypeface::Style requested_style,
-                       SkFontConfigInterface::FontIdentity* out_font_identity,
-                       SkString* out_family_name,
-                       SkTypeface::Style* out_style);
-  scoped_refptr<MappedFontFile> OpenStream(
-      const SkFontConfigInterface::FontIdentity& identity);
-
- private:
-  friend class base::RefCountedThreadSafe<FontServiceThread>;
-  ~FontServiceThread() override;
-
-  // Methods which run on the FontServiceThread. The public MatchFamilyName
-  // calls this method, this method calls the mojo interface, and sets up the
-  // callback to OnMatchFamilyNameComplete.
-  void MatchFamilyNameImpl(
-      base::WaitableEvent* done_event,
-      const char family_name[],
-      SkTypeface::Style requested_style,
-      bool* out_valid,
-      SkFontConfigInterface::FontIdentity* out_font_identity,
-      SkString* out_family_name,
-      SkTypeface::Style* out_style);
-
-  // Called on the FontServiceThread in response to receiving a message from
-  // our MatchFamily mojo IPC. This writes the data returned by mojo, and then
-  // signals |done_event| to wake up the other thread.
-  void OnMatchFamilyNameComplete(
-      base::WaitableEvent* done_event,
-      bool* out_valid,
-      SkFontConfigInterface::FontIdentity* out_font_identity,
-      SkString* out_family_name,
-      SkTypeface::Style* out_style,
-      FontIdentityPtr font_identity,
-      mojo::String family_name,
-      TypefaceStyle style);
-
-  // Implementation of OpenStream; same threading restrictions as MatchFamily.
-  void OpenStreamImpl(base::WaitableEvent* done_event,
-                      base::File* output_file,
-                      const uint32_t id_number);
-  void OnOpenStreamComplete(base::WaitableEvent* done_event,
-                            base::File* output_file,
-                            mojo::ScopedHandle handle);
-
-  // base::Thread
-  void Init() override;
-  void CleanUp() override;
-
-  // This member is used to safely pass data from one thread to another. It is
-  // set in the constructor and is consumed in Init().
-  mojo::InterfacePtrInfo<FontService> font_service_info_;
-
-  // This member is set in Init(). It takes |font_service_info_|, which is
-  // non-thread bound, and binds it to the newly created thread.
-  mojo::InterfacePtr<FontService> font_service_;
-
-  DISALLOW_COPY_AND_ASSIGN(FontServiceThread);
-};
-
-}  // namespace internal
-}  // namespace font_service
-
-#endif  // COMPONENTS_FONT_SERVICE_PUBLIC_CPP_FONT_SERVICE_THREAD_H_