Remove MutableProfileOAuth2TokenService on iOS.

google_apis/gaia/oauth2_access_token_fetcher_impl.cc

 // Copyright 2014 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.
 
 #include "google_apis/gaia/oauth2_access_token_fetcher_impl.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 118 matching lines @@
 
 }  // namespace
 
 OAuth2AccessTokenFetcherImpl::OAuth2AccessTokenFetcherImpl(
     OAuth2AccessTokenConsumer* consumer,
     net::URLRequestContextGetter* getter,
     const std::string& refresh_token)
     : OAuth2AccessTokenFetcher(consumer),
       getter_(getter),
       refresh_token_(refresh_token),
-      state_(INITIAL) {}
+      state_(INITIAL) {
+  DCHECK(getter_);
+}
 
 OAuth2AccessTokenFetcherImpl::~OAuth2AccessTokenFetcherImpl() {}
 
 void OAuth2AccessTokenFetcherImpl::CancelRequest() { fetcher_.reset(); }
 
 void OAuth2AccessTokenFetcherImpl::Start(
     const std::string& client_id,
     const std::string& client_secret,
     const std::vector<std::string>& scopes) {
   client_id_ = client_id;
@@ skipping 162 matching lines @@
 // static
 bool OAuth2AccessTokenFetcherImpl::ParseGetAccessTokenFailureResponse(
     const net::URLFetcher* source,
     std::string* error) {
   CHECK(error);
   scoped_ptr<base::DictionaryValue> value = ParseGetAccessTokenResponse(source);
   if (value.get() == NULL)
     return false;
   return value->GetString(kErrorKey, error);
 }