Avoid using an empty scopes set when requesting an OAuth2 access token.

google_apis/gaia/account_tracker.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/account_tracker.h"
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "net/url_request/url_request_context_getter.h"
@@ skipping 256 matching lines @@
       account_key_(account_key) {
   TRACE_EVENT_ASYNC_BEGIN1(
       "identity", "AccountIdFetcher", this, "account_key", account_key);
 }
 
 AccountIdFetcher::~AccountIdFetcher() {
   TRACE_EVENT_ASYNC_END0("identity", "AccountIdFetcher", this);
 }
 
 void AccountIdFetcher::Start() {
+  OAuth2TokenService::ScopeSet scopes;
+  scopes.insert("https://www.googleapis.com/auth/userinfo.profile");
   login_token_request_ = token_service_->StartRequest(
-      account_key_, OAuth2TokenService::ScopeSet(), this);
+      account_key_, scopes, this);
 }
 
 void AccountIdFetcher::OnGetTokenSuccess(
     const OAuth2TokenService::Request* request,
     const std::string& access_token,
     const base::Time& expiration_time) {
   TRACE_EVENT_ASYNC_STEP_PAST0(
       "identity", "AccountIdFetcher", this, "OnGetTokenSuccess");
   DCHECK_EQ(request, login_token_request_.get());
 
@@ skipping 39 matching lines @@
                                "AccountIdFetcher",
                                this,
                                "OnNetworkError",
                                "response_code",
                                response_code);
   LOG(ERROR) << "OnNetworkError " << response_code;
   tracker_->OnUserInfoFetchFailure(this);
 }
 
 }  // namespace gaia