[iOS] ios/web no longer depends on content::BrowserThread.

ios/web/web_thread_adapter.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 "ios/web/web_thread_adapter.h"
-
-#include "content/public/browser/browser_thread.h"
-
-namespace web {
-
-namespace {
-
-WebThread::ID WebThreadIDFromBrowserThreadID(
-    content::BrowserThread::ID identifier) {
-  switch (identifier) {
-    case content::BrowserThread::UI:
-      return WebThread::UI;
-    case content::BrowserThread::DB:
-      return WebThread::DB;
-    case content::BrowserThread::FILE:
-      return WebThread::FILE;
-    case content::BrowserThread::FILE_USER_BLOCKING:
-      return WebThread::FILE_USER_BLOCKING;
-    case content::BrowserThread::CACHE:
-      return WebThread::CACHE;
-    case content::BrowserThread::IO:
-      return WebThread::IO;
-    default:
-      NOTREACHED() << "Unknown content::BrowserThread::ID: " << identifier;
-      return WebThread::UI;
-  }
-}
-
-}  // namespace
-
-content::BrowserThread::ID BrowserThreadIDFromWebThreadID(
-    WebThread::ID identifier) {
-  switch (identifier) {
-    case WebThread::UI:
-      return content::BrowserThread::UI;
-    case WebThread::DB:
-      return content::BrowserThread::DB;
-    case WebThread::FILE:
-      return content::BrowserThread::FILE;
-    case WebThread::FILE_USER_BLOCKING:
-      return content::BrowserThread::FILE_USER_BLOCKING;
-    case WebThread::CACHE:
-      return content::BrowserThread::CACHE;
-    case WebThread::IO:
-      return content::BrowserThread::IO;
-    default:
-      NOTREACHED() << "Unknown web::WebThread::ID: " << identifier;
-      return content::BrowserThread::UI;
-  }
-}
-
-#pragma mark - web_thread.h implementation
-
-// static
-bool WebThread::PostTask(ID identifier,
-                         const tracked_objects::Location& from_here,
-                         const base::Closure& task) {
-  return content::BrowserThread::PostTask(
-      BrowserThreadIDFromWebThreadID(identifier), from_here, task);
-}
-
-// static
-bool WebThread::PostDelayedTask(ID identifier,
-                                const tracked_objects::Location& from_here,
-                                const base::Closure& task,
-                                base::TimeDelta delay) {
-  return content::BrowserThread::PostDelayedTask(
-      BrowserThreadIDFromWebThreadID(identifier), from_here, task, delay);
-}
-
-// static
-bool WebThread::PostNonNestableTask(ID identifier,
-                                    const tracked_objects::Location& from_here,
-                                    const base::Closure& task) {
-  return content::BrowserThread::PostNonNestableTask(
-      BrowserThreadIDFromWebThreadID(identifier), from_here, task);
-}
-
-// static
-bool WebThread::PostNonNestableDelayedTask(
-    ID identifier,
-    const tracked_objects::Location& from_here,
-    const base::Closure& task,
-    base::TimeDelta delay) {
-  return content::BrowserThread::PostNonNestableDelayedTask(
-      BrowserThreadIDFromWebThreadID(identifier), from_here, task, delay);
-}
-
-// static
-bool WebThread::PostTaskAndReply(ID identifier,
-                                 const tracked_objects::Location& from_here,
-                                 const base::Closure& task,
-                                 const base::Closure& reply) {
-  return content::BrowserThread::PostTaskAndReply(
-      BrowserThreadIDFromWebThreadID(identifier), from_here, task, reply);
-}
-
-// static
-bool WebThread::PostBlockingPoolTask(const tracked_objects::Location& from_here,
-                                     const base::Closure& task) {
-  return content::BrowserThread::PostBlockingPoolTask(from_here, task);
-}
-
-// static
-bool WebThread::PostBlockingPoolTaskAndReply(
-    const tracked_objects::Location& from_here,
-    const base::Closure& task,
-    const base::Closure& reply) {
-  return content::BrowserThread::PostBlockingPoolTaskAndReply(from_here, task,
-                                                              reply);
-}
-
-// static
-bool WebThread::PostBlockingPoolSequencedTask(
-    const std::string& sequence_token_name,
-    const tracked_objects::Location& from_here,
-    const base::Closure& task) {
-  return content::BrowserThread::PostBlockingPoolSequencedTask(
-      sequence_token_name, from_here, task);
-}
-
-// static
-base::SequencedWorkerPool* WebThread::GetBlockingPool() {
-  return content::BrowserThread::GetBlockingPool();
-}
-
-// static
-base::MessageLoop* WebThread::UnsafeGetMessageLoopForThread(ID identifier) {
-  return content::BrowserThread::UnsafeGetMessageLoopForThread(
-      BrowserThreadIDFromWebThreadID(identifier));
-}
-
-// static
-bool WebThread::IsThreadInitialized(ID identifier) {
-  return content::BrowserThread::IsThreadInitialized(
-      BrowserThreadIDFromWebThreadID(identifier));
-}
-
-// static
-bool WebThread::CurrentlyOn(ID identifier) {
-  return content::BrowserThread::CurrentlyOn(
-      BrowserThreadIDFromWebThreadID(identifier));
-}
-
-// static
-bool WebThread::IsMessageLoopValid(ID identifier) {
-  return content::BrowserThread::IsMessageLoopValid(
-      BrowserThreadIDFromWebThreadID(identifier));
-}
-
-// static
-bool WebThread::GetCurrentThreadIdentifier(ID* identifier) {
-  content::BrowserThread::ID content_identifier;
-  bool result =
-      content::BrowserThread::GetCurrentThreadIdentifier(&content_identifier);
-  if (result)
-    *identifier = WebThreadIDFromBrowserThreadID(content_identifier);
-  return result;
-}
-
-// static
-scoped_refptr<base::SingleThreadTaskRunner> WebThread::GetTaskRunnerForThread(
-    ID identifier) {
-  return content::BrowserThread::GetMessageLoopProxyForThread(
-      BrowserThreadIDFromWebThreadID(identifier));
-}
-
-// static
-std::string WebThread::GetDCheckCurrentlyOnErrorMessage(ID expected) {
-  return content::BrowserThread::GetDCheckCurrentlyOnErrorMessage(
-      BrowserThreadIDFromWebThreadID(expected));
-}
-
-}  // namespace web