Pull AsyncApiFunction out of src/chrome

chrome/browser/extensions/api/api_function.cc

-// Copyright (c) 2012 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/browser/extensions/api/api_function.h"
-
-#include "base/bind.h"
-#include "chrome/browser/profiles/profile.h"
-#include "extensions/browser/extension_system.h"
-
-using content::BrowserThread;
-
-namespace extensions {
-
-ApiFunction::ApiFunction() {
-}
-
-ApiFunction::~ApiFunction() {
-}
-
-// AsyncApiFunction
-AsyncApiFunction::AsyncApiFunction()
-    : work_thread_id_(BrowserThread::IO) {
-}
-
-AsyncApiFunction::~AsyncApiFunction() {
-}
-
-bool AsyncApiFunction::RunImpl() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  if (!PrePrepare() || !Prepare()) {
-    return false;
-  }
-  bool rv = BrowserThread::PostTask(
-      work_thread_id_, FROM_HERE,
-      base::Bind(&AsyncApiFunction::WorkOnWorkThread, this));
-  DCHECK(rv);
-  return true;
-}
-
-bool AsyncApiFunction::PrePrepare() {
-  return true;
-}
-
-void AsyncApiFunction::Work() {
-}
-
-void AsyncApiFunction::AsyncWorkStart() {
-  Work();
-  AsyncWorkCompleted();
-}
-
-void AsyncApiFunction::AsyncWorkCompleted() {
-  if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
-    bool rv = BrowserThread::PostTask(
-        BrowserThread::UI, FROM_HERE,
-        base::Bind(&AsyncApiFunction::RespondOnUIThread, this));
-    DCHECK(rv);
-  } else {
-    SendResponse(Respond());
-  }
-}
-
-void AsyncApiFunction::WorkOnWorkThread() {
-  DCHECK(BrowserThread::CurrentlyOn(work_thread_id_));
-  DLOG_IF(ERROR, (work_thread_id_ == BrowserThread::UI)) <<
-      "You have specified that AsyncApiFunction::Work() should happen on "
-      "the UI thread. This nullifies the point of this class. Either "
-      "specify a different thread or derive from a different class.";
-  AsyncWorkStart();
-}
-
-void AsyncApiFunction::RespondOnUIThread() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  SendResponse(Respond());
-}
-
-}  // namespace extensions