[Doodle] Allow cookie authentication

components/doodle/doodle_fetcher_impl.cc

 // Copyright 2017 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 "components/doodle/doodle_fetcher_impl.h"
 
 #include <utility>
 
 #include "base/strings/stringprintf.h"
 #include "base/time/time.h"
@@ skipping 69 matching lines @@
   callbacks_.push_back(std::move(callback));
   net::NetworkTrafficAnnotationTag traffic_annotation =
       net::DefineNetworkTrafficAnnotation("doodle_fetcher", R"(
         semantics {
           sender: "Doodle Fetcher"
           description:
             "Retrieves metadata (image URL, clickthrough URL etc) for any "
             "currently running Doodle."
           trigger:
             "Displaying the new tab page on Android."
-          data: "None."
+          data:
+            "The user's Google cookies. Used for example to show birthday "
+            "doodles at appropriate times."
           destination: GOOGLE_OWNED_SERVICE
         }
         policy {
-          cookies_allowed: false
+          cookies_allowed: true
+          cookies_store: "user"
           setting:
             "Choosing a non-Google search engine in Chromium settings under "
             "'Search Engine' will disable this feature."
           policy_exception_justification:
             "Not implemented, considered not useful as it does not upload any "
             "data."
         })");
   fetcher_ = URLFetcher::Create(
       BuildDoodleURL(GetGoogleBaseUrl(), gray_background_, override_url_),
       URLFetcher::GET, this, traffic_annotation);
   fetcher_->SetRequestContext(download_context_.get());
-  fetcher_->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
-                         net::LOAD_DO_NOT_SAVE_COOKIES |
-                         net::LOAD_DO_NOT_SEND_AUTH_DATA);
+  // TODO(treib): Use OAuth2 authentication instead of cookies. crbug.com/711314
+  fetcher_->SetLoadFlags(net::LOAD_DO_NOT_SEND_AUTH_DATA);
   fetcher_->SetAutomaticallyRetryOnNetworkChanges(1);
   data_use_measurement::DataUseUserData::AttachToFetcher(
       fetcher_.get(), data_use_measurement::DataUseUserData::DOODLE);
   fetcher_->Start();
 }
 
 void DoodleFetcherImpl::OnURLFetchComplete(const URLFetcher* source) {
   DCHECK_EQ(fetcher_.get(), source);
   std::unique_ptr<net::URLFetcher> free_fetcher = std::move(fetcher_);
 
@@ skipping 79 matching lines @@
 
 GURL DoodleFetcherImpl::GetGoogleBaseUrl() const {
   GURL cmd_line_url = google_util::CommandLineGoogleBaseURL();
   if (cmd_line_url.is_valid()) {
     return cmd_line_url;
   }
   return google_url_tracker_->google_url();
 }
 
 }  // namespace doodle