Adding the AccessTokenFetcher and Environment class to the app remoting test

remoting/test/fake_access_token_fetcher.cc

Index: remoting/test/fake_access_token_fetcher.cc
diff --git a/remoting/test/fake_access_token_fetcher.cc b/remoting/test/fake_access_token_fetcher.cc
new file mode 100644
index 0000000000000000000000000000000000000000..64882f1c7770a8ee1661b7e573c151d524b18644
--- /dev/null
+++ b/remoting/test/fake_access_token_fetcher.cc
@@ -0,0 +1,51 @@
+// 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/fake_access_token_fetcher.h"
+
+namespace remoting {
+namespace test {
+
+FakeAccessTokenFetcher::FakeAccessTokenFetcher() :
+    simulate_auth_code_error_(false),
+    simulate_refresh_token_error_(false) {}
+
+FakeAccessTokenFetcher::~FakeAccessTokenFetcher() {}
+
+
+void FakeAccessTokenFetcher::GetAccessTokenFromAuthCode(
+    const std::string& auth_code,
+    const AccessTokenCallback& callback) {
+  if (simulate_auth_code_error_) {
+    // Empty strings are returned in failure cases.
+    callback.Run(std::string(), std::string());
+  } else {
+    callback.Run(kFakeAccessTokenFetcherAccessTokenValue,
+                 kFakeAccessTokenFetcherRefreshTokenValue);
+  }
+}
+
+void FakeAccessTokenFetcher::GetAccessTokenFromRefreshToken(
+    const std::string& refresh_token,
+    const AccessTokenCallback& callback) {
+  if (simulate_refresh_token_error_) {
+    // Empty strings are returned in failure cases.
+    callback.Run(std::string(), std::string());
+  } else {
+    callback.Run(kFakeAccessTokenFetcherAccessTokenValue,
+                 kFakeAccessTokenFetcherRefreshTokenValue);
+  }
+}
+
+void FakeAccessTokenFetcher::SetAuthCodeError(bool simulate_auth_code_error) {
+  simulate_auth_code_error_ = simulate_auth_code_error;
+}
+
+void FakeAccessTokenFetcher::SetRefreshTokenError(
+    bool simulate_refresh_token_error) {
+  simulate_refresh_token_error_ = simulate_refresh_token_error;
+}
+
+}  // namespace test
+}  // namespace remoting