Making OAuth2TokenService multi-login aware, updating callers, minor fixes

chrome/android/java/src/org/chromium/chrome/browser/signin/AndroidProfileOAuth2TokenServiceHelper.java

 // 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.
 
 package org.chromium.chrome.browser.signin;
 
 import android.accounts.Account;
 import android.app.Activity;
 import android.content.Context;
 import android.util.Log;
@@ skipping 33 matching lines @@
         AccountManagerHelper accountManagerHelper = AccountManagerHelper.get(context);
         Account account = accountManagerHelper.getAccountFromName(username);
         if (account == null) {
             Log.e(TAG, "Account not found for provided username.");
             return null;
         }
         return account;
     }
 
     /**
+     * Called by native to list the accounts with OAuth2 refresh tokens.
+     */
+    @CalledByNative
+    public static String[] getAccounts(Context context) {
+        AccountManagerHelper accountManagerHelper = AccountManagerHelper.get(context);
+        java.util.List<String> accountNames = accountManagerHelper.getGoogleAccountNames();
+        return accountNames.toArray(new String[accountNames.size()]);
+    }
+
+    /**
      * Called by native to retrieve OAuth2 tokens.
      *
      * @param username The native username (full address).
      * @param scope The scope to get an auth token for (without Android-style 'oauth2:' prefix).
      * @param nativeCallback The pointer to the native callback that should be run upon completion.
      */
     @CalledByNative
     public static void getOAuth2AuthToken(
             Context context, String username, String scope, final int nativeCallback) {
         Account account = getAccountOrNullFromUsername(context, username);
@@ skipping 65 matching lines @@
                         timeout + " + " + unit.name() + ")");
                 return null;
             }
         } catch (InterruptedException e) {
             Log.w(TAG, "Got interrupted while waiting for auth token");
             return null;
         }
     }
 
     /**
+     * Called by native to check wether the account has an OAuth2 refresh token.
+     */
+    @CalledByNative
+    public static boolean hasOAuth2RefreshToken(Context context, String accountName) {
+        return AccountManagerHelper.get(context).hasAccountForName(accountName);
+    }
+
+    /**
     * Called by native to invalidate an OAuth2 token.
     */
     @CalledByNative
     public static void invalidateOAuth2AuthToken(Context context, String accessToken) {
         if (accessToken != null) {
             AccountManagerHelper.get(context).invalidateAuthToken(accessToken);
         }
     }
 
     private static native void nativeOAuth2TokenFetched(
             String authToken, boolean result, int nativeCallback);
 
 }