Adding the AccessTokenFetcher and Environment class to the app remoting test

remoting/test/mock_access_token_fetcher.cc

+// 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.
+
+#include "remoting/test/mock_access_token_fetcher.h"
+
+namespace remoting {
+namespace test {
+
+MockAccessTokenFetcher::MockAccessTokenFetcher() {
+}
+
+MockAccessTokenFetcher::~MockAccessTokenFetcher() {
+}
+
+void MockAccessTokenFetcher::CompleteAuthCodeCallback(
+    const std::string& auth_code,
+    const AccessTokenCallback& callback) {
+  DCHECK(!callback.is_null());

[Wez, 2015/02/13 03:01:54]

No need to check a callback immediately before Run()

[joedow, 2015/02/14 02:31:29]

Done.

+  callback.Run(kMockAccessTokenFetcherAccessTokenValue,
+               kMockAccessTokenFetcherRefreshTokenValue);
+}
+
+void MockAccessTokenFetcher::CompleteAuthCodeFailedCallback(
+    const std::string& auth_code,
+    const AccessTokenCallback& callback) {
+  DCHECK(!callback.is_null());
+  // Empty strings are returned in failure cases.
+  callback.Run("", "");
+}
+
+void MockAccessTokenFetcher::CompleteRefreshTokenCallback(
+    const std::string& auth_code,
+    const AccessTokenCallback& callback) {
+  DCHECK(!callback.is_null());
+  callback.Run(kMockAccessTokenFetcherAccessTokenValue,
+               kMockAccessTokenFetcherRefreshTokenValue);
+}
+
+void MockAccessTokenFetcher::CompleteRefreshTokenFailedCallback(
+    const std::string& auth_code,
+    const AccessTokenCallback& callback) {
+  DCHECK(!callback.is_null());
+  // Empty strings are returned in failure cases.
+  callback.Run("", "");
+}
+
+}  // namespace test
+}  // namespace remoting