Revert "Expose the ability to manually refresh tokens, for APIs that provide refresh_tokens but don't set an expiry time (SalesForce for instance). Fixes googleworkspace#10."

This reverts commit 2c20b21.

Author: Eric Koleda

Service.gs

@@ -28,7 +28,6 @@ var Service_ = function(serviceName) {
   this.serviceName_ = serviceName;
   this.params_ = {};
   this.tokenFormat_ = TOKEN_FORMAT.JSON;
-  this.stateParameterLocation_ = STATE_PARAMETER_LOCATION.AUTHORIZATION_URL;
 };
 
 /**
@@ -70,18 +69,6 @@ Service_.prototype.setTokenFormat = function(tokenFormat) {
   return this;
 };
 
-/**
- * Sets the location of the state parameter, which is required by the
- * /usercallback endpoint.
- * Default: OAuth2.STATE_PARAMETER_LOCATION.AUTHORIZATION_URL.
- * @param {STATE_PARAMETER_LOCATION} tokenFormat The format of the returned token.
- * @return {Service_} This service, for chaining.
- */
-Service_.prototype.setStateParameterLocation = function(stateParameterLocation) {
-  this.stateParameterLocation_ = stateParameterLocation
-  return this;
-};
-
 /**
  * Sets the project key of the script that contains the authorization callback function (required).
  * The project key can be found in the Script Editor UI under "File > Project properties".
@@ -207,16 +194,10 @@ Service_.prototype.getAuthorizationUrl = function() {
       .createToken();
   var params = {
     client_id: this.clientId_,
-    response_type: 'code'
+    response_type: 'code',
+    redirect_uri: redirectUri,
+    state: state
   };
-  if (this.stateParameterLocation_ == STATE_PARAMETER_LOCATION.AUTHORIZATION_URL) {
-    params['state'] = state;
-  } else {
-    redirectUri = buildUrl_(redirectUri, {
-      state: state
-    });
-  }
-  params['redirect_uri'] = redirectUri;
   params = _.extend(params, this.params_);
   return buildUrl_(this.authorizationBaseUrl_, params);
 };
@@ -346,8 +327,9 @@ Service_.prototype.parseToken_ = function(content) {
 /**
  * Refreshes a token that has expired. This is only possible if offline access was
  * requested when the token was authorized.
+ * @private
  */
-Service_.prototype.refresh = function() {
+Service_.prototype.refresh_ = function() {
   validate_({
     'Client ID': this.clientId_,
     'Client Secret': this.clientSecret_,