Use OAuth2AccessTokenFetcher implementation on Android.

chrome/browser/signin/android_profile_oauth2_token_service.h

 // Copyright 2013 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 CHROME_BROWSER_SIGNIN_ANDROID_PROFILE_OAUTH2_TOKEN_SERVICE_H_
 #define CHROME_BROWSER_SIGNIN_ANDROID_PROFILE_OAUTH2_TOKEN_SERVICE_H_
 
 #include <jni.h>
 #include <string>
 
@@ skipping 70 matching lines @@
 
   // Overridden from OAuth2TokenService to complete signout of all
   // OA2TService aware accounts.
   virtual void RevokeAllCredentials() OVERRIDE;
 
  protected:
   friend class ProfileOAuth2TokenServiceFactory;
   AndroidProfileOAuth2TokenService();
   virtual ~AndroidProfileOAuth2TokenService();
 
-  // Overridden from OAuth2TokenService to intercept token fetch requests and
-  // redirect them to the Account Manager.
-  virtual void FetchOAuth2Token(RequestImpl* request,
-                                const std::string& account_id,
-                                net::URLRequestContextGetter* getter,
-                                const std::string& client_id,
-                                const std::string& client_secret,
-                                const ScopeSet& scopes) OVERRIDE;
-
-  // Overriden from OAuth2TokenService to avoid compile errors. Has NOTREACHED()
-  // implementation as |AndroidProfileOAuth2TokenService| overrides
-  // |FetchOAuth2Token| and thus bypasses this method entirely.
   virtual OAuth2AccessTokenFetcher* CreateAccessTokenFetcher(
       const std::string& account_id,
       net::URLRequestContextGetter* getter,
       OAuth2AccessTokenConsumer* consumer) OVERRIDE;
 
   // Overridden from OAuth2TokenService to intercept token fetch requests and
   // redirect them to the Account Manager.
   virtual void InvalidateOAuth2Token(const std::string& account_id,
                                      const std::string& client_id,
                                      const ScopeSet& scopes,
@@ skipping 20 matching lines @@
 
  private:
   base::android::ScopedJavaGlobalRef<jobject> java_ref_;
 
   static bool is_testing_profile_;
 
   DISALLOW_COPY_AND_ASSIGN(AndroidProfileOAuth2TokenService);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_ANDROID_PROFILE_OAUTH2_TOKEN_SERVICE_H_