Move c/b/google_apis to google_apis/drive.

chrome/browser/google_apis/task_util.h

-// 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.
-
-#ifndef CHROME_BROWSER_GOOGLE_APIS_TASK_UTIL_H_
-#define CHROME_BROWSER_GOOGLE_APIS_TASK_UTIL_H_
-
-#include "base/bind.h"
-#include "base/message_loop/message_loop_proxy.h"
-
-namespace google_apis {
-
-// Runs task on the thread to which |task_runner| belongs.
-void RunTaskOnThread(scoped_refptr<base::SingleThreadTaskRunner> task_runner,
-                     const base::Closure& task);
-
-namespace internal {
-
-// Implementation of the composed callback, whose signature is |Sig|.
-template<typename Sig> struct ComposedCallback;
-
-// ComposedCallback with no argument.
-template<>
-struct ComposedCallback<void()> {
-  static void Run(
-      const base::Callback<void(const base::Closure&)>& runner,
-      const base::Closure& callback) {
-    runner.Run(callback);
-  }
-};
-
-// ComposedCallback with one argument.
-template<typename T1>
-struct ComposedCallback<void(T1)> {
-  static void Run(
-      const base::Callback<void(const base::Closure&)>& runner,
-      const base::Callback<void(T1)>& callback,
-      T1 arg1) {
-    runner.Run(base::Bind(callback, arg1));
-  }
-};
-
-// ComposedCallback with two arguments.
-template<typename T1, typename T2>
-struct ComposedCallback<void(T1, T2)> {
-  static void Run(
-      const base::Callback<void(const base::Closure&)>& runner,
-      const base::Callback<void(T1, T2)>& callback,
-      T1 arg1, T2 arg2) {
-    runner.Run(base::Bind(callback, arg1, arg2));
-  }
-};
-
-// ComposedCallback with two arguments, and the last one is scoped_ptr.
-template<typename T1, typename T2, typename D2>
-struct ComposedCallback<void(T1, scoped_ptr<T2, D2>)> {
-  static void Run(
-      const base::Callback<void(const base::Closure&)>& runner,
-      const base::Callback<void(T1, scoped_ptr<T2, D2>)>& callback,
-      T1 arg1, scoped_ptr<T2, D2> arg2) {
-    runner.Run(base::Bind(callback, arg1, base::Passed(&arg2)));
-  }
-};
-
-// ComposedCallback with three arguments.
-template<typename T1, typename T2, typename T3>
-struct ComposedCallback<void(T1, T2, T3)> {
-  static void Run(
-      const base::Callback<void(const base::Closure&)>& runner,
-      const base::Callback<void(T1, T2, T3)>& callback,
-      T1 arg1, T2 arg2, T3 arg3) {
-    runner.Run(base::Bind(callback, arg1, arg2, arg3));
-  }
-};
-
-// ComposedCallback with three arguments, and the last one is scoped_ptr.
-template<typename T1, typename T2, typename T3, typename D3>
-struct ComposedCallback<void(T1, T2, scoped_ptr<T3, D3>)> {
-  static void Run(
-      const base::Callback<void(const base::Closure&)>& runner,
-      const base::Callback<void(T1, T2, scoped_ptr<T3, D3>)>& callback,
-      T1 arg1, T2 arg2, scoped_ptr<T3, D3> arg3) {
-    runner.Run(base::Bind(callback, arg1, arg2, base::Passed(&arg3)));
-  }
-};
-
-// ComposedCallback with four arguments.
-template<typename T1, typename T2, typename T3, typename T4>
-struct ComposedCallback<void(T1, T2, T3, T4)> {
-  static void Run(
-      const base::Callback<void(const base::Closure&)>& runner,
-      const base::Callback<void(T1, T2, T3, T4)>& callback,
-      T1 arg1, T2 arg2, T3 arg3, T4 arg4) {
-    runner.Run(base::Bind(callback, arg1, arg2, arg3, arg4));
-  }
-};
-
-// ComposedCallback with four arguments, and the second one is scoped_ptr.
-template<typename T1, typename T2, typename D2, typename T3, typename T4>
-struct ComposedCallback<void(T1, scoped_ptr<T2, D2>, T3, T4)> {
-  static void Run(
-      const base::Callback<void(const base::Closure&)>& runner,
-      const base::Callback<void(T1, scoped_ptr<T2, D2>, T3, T4)>& callback,
-      T1 arg1, scoped_ptr<T2, D2> arg2, T3 arg3, T4 arg4) {
-    runner.Run(base::Bind(callback, arg1, base::Passed(&arg2), arg3, arg4));
-  }
-};
-
-}  // namespace internal
-
-// Returns callback that takes arguments (arg1, arg2, ...), create a closure
-// by binding them to |callback|, and runs |runner| with the closure.
-// I.e. the returned callback works as follows:
-//   runner.Run(Bind(callback, arg1, arg2, ...))
-template<typename CallbackType>
-CallbackType CreateComposedCallback(
-    const base::Callback<void(const base::Closure&)>& runner,
-    const CallbackType& callback) {
-  DCHECK(!runner.is_null());
-  DCHECK(!callback.is_null());
-  return base::Bind(
-      &internal::ComposedCallback<typename CallbackType::RunType>::Run,
-      runner, callback);
-}
-
-// Returns callback which runs the given |callback| on the current thread.
-template<typename CallbackType>
-CallbackType CreateRelayCallback(const CallbackType& callback) {
-  return CreateComposedCallback(
-      base::Bind(&RunTaskOnThread, base::MessageLoopProxy::current()),
-      callback);
-}
-
-}  // namespace google_apis
-
-#endif  // CHROME_BROWSER_GOOGLE_APIS_TASK_UTIL_H_