Adding the AccessTokenFetcher and Environment class to the app remoting test

remoting/test/refresh_token_store.h

Index: remoting/test/refresh_token_store.h
diff --git a/remoting/test/refresh_token_store.h b/remoting/test/refresh_token_store.h
new file mode 100644
index 0000000000000000000000000000000000000000..3594867479794d2c11578cd08eebd0c88424c4c8
--- /dev/null
+++ b/remoting/test/refresh_token_store.h
@@ -0,0 +1,39 @@
+// 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.
+
+#ifndef REMOTING_TEST_REFRESH_TOKEN_STORE_H_
+#define REMOTING_TEST_REFRESH_TOKEN_STORE_H_
+
+#include <string>
+
+#include "base/memory/scoped_ptr.h"
+
+namespace remoting {
+namespace test {
+
+// Used to store and retrieve refresh tokens.  This interface is provided to
+// allow for stubbing out the storage mechanism for testing.
+class RefreshTokenStore {
+ public:
+  RefreshTokenStore() {}
+  virtual ~RefreshTokenStore() {}
+
+  virtual std::string FetchRefreshToken(
+      const std::string& user_name) = 0;
+  virtual bool StoreRefreshToken(
+      const std::string& user_name,
+      const std::string& refresh_token) = 0;
+
+  // Stores and retrieves a refresh token from a file in a user-readable folder
+  // on the local disk.  If needed, the file is created and has its permissions

[Wez, 2015/02/24 03:10:19]

No it doesn't. ;)  It returns an token store that reads/writes a user-specific
token file.

[joedow1, 2015/02/24 05:17:41]

Done.

+  // set for the local user account when the first refresh_token is stored.  The
+  // path to the folder includes the |user_name| so that refresh_tokens for
+  // multiple users can be stored on the same machine.

[Wez, 2015/02/24 03:10:19]

Should |user_name| be a parameter to the store creation method, rather than to
APIs?  As it is it would be possible to use a single store to read/write tokens
for multiple different users, which seems odd.

[joedow1, 2015/02/24 05:17:41]

I think this is a by product of the original functions being converted to a
class.  I'll update it as I think it makes sense to  create a user specific
RefreshTokenStore using this method. 

+  static scoped_ptr<RefreshTokenStore> OnDisk();
+};
+
+}  // namespace test
+}  // namespace remoting
+
+#endif  // REMOTING_TEST_REFRESH_TOKEN_STORE_H_