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 {
+
+using ::testing::_;
+using ::testing::Invoke;
+
+MockAccessTokenFetcher::MockAccessTokenFetcher() {
+}
+
+MockAccessTokenFetcher::~MockAccessTokenFetcher() {
+}
+
+void MockAccessTokenFetcher::SetFakeAccessTokenFetcher(
+    scoped_ptr<AccessTokenFetcher> fake) {
+  fake_ = fake.Pass();
+
+  DelegateMethodCallsToFake();
+}
+
+void MockAccessTokenFetcher::DelegateMethodCallsToFake() {
+  ON_CALL(*this, GetAccessTokenFromAuthCode(_, _)).WillByDefault(
+      Invoke(fake_.get(), &AccessTokenFetcher::GetAccessTokenFromAuthCode));
+  ON_CALL(*this, GetAccessTokenFromRefreshToken(_, _)).WillByDefault(
+      Invoke(fake_.get(), &AccessTokenFetcher::GetAccessTokenFromRefreshToken));
+}
+
+}  // namespace test
+}  // namespace remoting