Revert of Add enterprise enrollment support for fake users.

chrome/browser/chromeos/policy/policy_oauth2_token_fetcher.h

Index: chrome/browser/chromeos/policy/policy_oauth2_token_fetcher.h
diff --git a/chrome/browser/chromeos/policy/policy_oauth2_token_fetcher.h b/chrome/browser/chromeos/policy/policy_oauth2_token_fetcher.h
index f112280dd8816558c1a79170086ad6f46604038f..18ef8c187f9a70c6d7edceba94b42eb413e152ac 100644
--- a/chrome/browser/chromeos/policy/policy_oauth2_token_fetcher.h
+++ b/chrome/browser/chromeos/policy/policy_oauth2_token_fetcher.h
@@ -9,8 +9,12 @@
 #include <string>
 
 #include "base/callback.h"
+#include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
 #include "google_apis/gaia/gaia_auth_consumer.h"
+#include "google_apis/gaia/oauth2_access_token_consumer.h"
 
 class GaiaAuthFetcher;
 class OAuth2AccessTokenFetcher;
@@ -26,43 +30,96 @@
 // send a (possibly empty) token to the callback, which will then let the policy
 // subsystem proceed and resume Profile creation. Sending the token even when no
 // Profile is pending is also OK.
-class PolicyOAuth2TokenFetcher {
+class PolicyOAuth2TokenFetcher
+    : public base::SupportsWeakPtr<PolicyOAuth2TokenFetcher>,
+      public GaiaAuthConsumer,
+      public OAuth2AccessTokenConsumer {
  public:
-  // Allocates a PolicyOAuth2TokenFetcher instance.
-  static PolicyOAuth2TokenFetcher* CreateInstance();
-
-  // Makes CreateInstance() return a fake token fetcher that does not make
-  // network calls so tests can avoid a dependency on GAIA.
-  static void UseFakeTokensForTesting();
-
-  using TokenCallback =
-      base::Callback<void(const std::string&, const GoogleServiceAuthError&)>;
+  typedef base::Callback<void(const std::string&,
+                              const GoogleServiceAuthError&)> TokenCallback;
 
   PolicyOAuth2TokenFetcher();
-  virtual ~PolicyOAuth2TokenFetcher();
+  ~PolicyOAuth2TokenFetcher() override;
 
   // Fetches the device management service's oauth2 token. This may be fetched
   // via signin context, auth code, or oauth2 refresh token.
-  virtual void StartWithSigninContext(
+  void StartWithSigninContext(
       net::URLRequestContextGetter* auth_context_getter,
       net::URLRequestContextGetter* system_context_getter,
-      const TokenCallback& callback) = 0;
-  virtual void StartWithAuthCode(
-      const std::string& auth_code,
-      net::URLRequestContextGetter* system_context_getter,
-      const TokenCallback& callback) = 0;
-  virtual void StartWithRefreshToken(
+      const TokenCallback& callback);
+  void StartWithAuthCode(const std::string& auth_code,
+                         net::URLRequestContextGetter* system_context_getter,
+                         const TokenCallback& callback);
+  void StartWithRefreshToken(
       const std::string& oauth2_refresh_token,
       net::URLRequestContextGetter* system_context_getter,
-      const TokenCallback& callback) = 0;
+      const TokenCallback& callback);
 
   // Returns true if we have previously attempted to fetch tokens with this
   // class and failed.
-  virtual bool Failed() const = 0;
-  virtual const std::string& OAuth2RefreshToken() const = 0;
-  virtual const std::string& OAuth2AccessToken() const = 0;
+  bool failed() const {
+    return failed_;
+  }
+
+  const std::string& oauth2_refresh_token() const {
+    return oauth2_refresh_token_;
+  }
+  const std::string& oauth2_access_token() const {
+    return oauth2_access_token_;
+  }
 
  private:
+  // GaiaAuthConsumer overrides.
+  void OnClientOAuthSuccess(
+      const GaiaAuthConsumer::ClientOAuthResult& oauth_tokens) override;
+  void OnClientOAuthFailure(const GoogleServiceAuthError& error) override;
+
+  // OAuth2AccessTokenConsumer overrides.
+  void OnGetTokenSuccess(const std::string& access_token,
+                         const base::Time& expiration_time) override;
+  void OnGetTokenFailure(const GoogleServiceAuthError& error) override;
+
+  // Starts fetching OAuth2 refresh token.
+  void StartFetchingRefreshToken();
+
+  // Starts fetching OAuth2 access token for the device management service.
+  void StartFetchingAccessToken();
+
+  // Decides how to proceed on GAIA |error|. If the error looks temporary,
+  // retries |task| until max retry count is reached.
+  // If retry count runs out, or error condition is unrecoverable, it calls
+  // Delegate::OnOAuth2TokenFetchFailed().
+  void RetryOnError(const GoogleServiceAuthError& error,
+                    const base::Closure& task);
+
+  // Passes |token| and |error| to the |callback_|.
+  void ForwardPolicyToken(const std::string& token,
+                          const GoogleServiceAuthError& error);
+
+  // Auth code which is used to retreive a refresh token.
+  std::string auth_code_;
+
+  scoped_refptr<net::URLRequestContextGetter> auth_context_getter_;
+  scoped_refptr<net::URLRequestContextGetter> system_context_getter_;
+  std::unique_ptr<GaiaAuthFetcher> refresh_token_fetcher_;
+  std::unique_ptr<OAuth2AccessTokenFetcher> access_token_fetcher_;
+
+  // OAuth2 refresh token. Could come either from the outside or through
+  // refresh token fetching flow within this class.
+  std::string oauth2_refresh_token_;
+
+  // OAuth2 access token.
+  std::string oauth2_access_token_;
+
+  // The retry counter. Increment this only when failure happened.
+  int retry_count_ = 0;
+
+  // True if we have already failed to fetch the policy.
+  bool failed_ = false;
+
+  // The callback to invoke when done.
+  TokenCallback callback_;
+
   DISALLOW_COPY_AND_ASSIGN(PolicyOAuth2TokenFetcher);
 };