Fix a bunch of clang warnings/errors.

chrome/browser/net/gaia/token_service.h

 // Copyright (c) 2010 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.
 //
 // The TokenService will supply authentication tokens for any service that
 // needs it, such as sync. Whenever the user logs in, a controller watching
 // the token service is expected to call ClientLogin to derive a new SID and
 // LSID. Whenever such credentials are available, the TokenService should be
 // updated with new credentials. The controller should then start fetching
 // tokens, which will be written to the database after retrieval, as well as
@@ skipping 97 matching lines @@
   // You should do this at startup. Optionally you can do it again
   // after you reset in memory credentials.
   void LoadTokensFromDB();
 
   // Clear all DB stored tokens for the current profile. Tokens may still be
   // available in memory. If a DB load is pending it may still be serviced.
   void EraseTokensFromDB();
 
   // For legacy services with their own auth routines, they can just read
   // the LSID out directly. Deprecated.
-  const bool HasLsid() const;
+  bool HasLsid() const;
   const std::string& GetLsid() const;
   // Did we get a proper LSID?
-  const bool AreCredentialsValid() const;
+  bool AreCredentialsValid() const;
 
   // Tokens will be fetched for all services(sync, talk) in the background.
   // Results come back via event channel. Services can also poll before events
   // are issued.
   void StartFetchingTokens();
-  const bool HasTokenForService(const char* const service) const;
+  bool HasTokenForService(const char* const service) const;
   const std::string& GetTokenForService(const char* const service) const;
 
   // For tests only. Doesn't save to the WebDB.
   void IssueAuthTokenForTest(const std::string& service,
                              const std::string& auth_token);
 
   // GaiaAuthConsumer implementation.
   virtual void OnIssueAuthTokenSuccess(const std::string& service,
                                        const std::string& auth_token);
   virtual void OnIssueAuthTokenFailure(const std::string& service,
@@ skipping 46 matching lines @@
 
   NotificationRegistrar registrar_;
 
   FRIEND_TEST_ALL_PREFIXES(TokenServiceTest, LoadTokensIntoMemoryBasic);
   FRIEND_TEST_ALL_PREFIXES(TokenServiceTest, LoadTokensIntoMemoryAdvanced);
 
   DISALLOW_COPY_AND_ASSIGN(TokenService);
 };
 
 #endif  // CHROME_BROWSER_NET_GAIA_TOKEN_SERVICE_H_