Network traffic annotation added to chrome_omnibox_navigation_observer.

chrome/browser/ui/omnibox/chrome_omnibox_navigation_observer.cc

 // Copyright (c) 2012 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 "chrome/browser/ui/omnibox/chrome_omnibox_navigation_observer.h"
 
 #include "chrome/browser/autocomplete/shortcuts_backend_factory.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/intranet_redirect_detector.h"
 #include "chrome/browser/ui/omnibox/alternate_nav_infobar_delegate.h"
 #include "components/omnibox/browser/shortcuts_backend.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_details.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/navigation_handle.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/browser/web_contents.h"
 #include "net/base/load_flags.h"
 #include "net/base/registry_controlled_domains/registry_controlled_domain.h"
+#include "net/traffic_annotation/network_traffic_annotation.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_request.h"
 
 
 // Helpers --------------------------------------------------------------------
 
 namespace {
 
 // HTTP 2xx, 401, and 407 all indicate that the target address exists.
 bool ResponseCodeIndicatesSuccess(int response_code) {
@@ skipping 23 matching lines @@
     const base::string16& text,
     const AutocompleteMatch& match,
     const AutocompleteMatch& alternate_nav_match)
     : text_(text),
       match_(match),
       alternate_nav_match_(alternate_nav_match),
       shortcuts_backend_(ShortcutsBackendFactory::GetForProfile(profile)),
       load_state_(LOAD_NOT_SEEN),
       fetch_state_(FETCH_NOT_COMPLETE) {
   if (alternate_nav_match_.destination_url.is_valid()) {
+    net::NetworkTrafficAnnotationTag traffic_annotation =
+        net::DefineNetworkTrafficAnnotation("omnibox_navigation_observer", R"(
+          semantics {
+            sender: "Omnibox"
+            description:
+              "Certain omnibox inputs, e.g. single words, may either be search "
+              "queries or attempts to navigate to intranet hostnames. When "
+              "such a hostname is not in the user's history, a background "
+              "request is made to see if it is navigable.  If so, the browser "
+              "will display a prompt on the search results page asking if the "
+              "user wished to navigate instead of searching."
+            trigger:
+              "User attempts to search for a string that is plausibly a "
+              "navigable hostname but is not in the local history."
+            data:
+              "None. However, the hostname itself is a string the user "
+              "searched for, and thus can expose data about the user's "
+              "searches."
+            destination: WEBSITE
+          }
+          policy {
+            cookies_allowed: true
+            cookies_store: "user"
+            setting: "This feature cannot be disabled in settings."
+            policy_exception_justification:
+              "By disabling DefaultSearchProviderEnabled, one can disable "
+              "default search, and once users can't search, they can't hit "
+              "this. More fine-grained policies are requested to be "
+              "implemented (crbug.com/81226)."
+          })");
     fetcher_ = net::URLFetcher::Create(alternate_nav_match_.destination_url,
-                                       net::URLFetcher::HEAD, this);
+                                       net::URLFetcher::HEAD, this,
+                                       traffic_annotation);
     fetcher_->SetLoadFlags(net::LOAD_DO_NOT_SAVE_COOKIES);
     fetcher_->SetStopOnRedirect(true);
   }
   // We need to start by listening to AllSources, since we don't know which tab
   // the navigation might occur in.
   registrar_.Add(this, content::NOTIFICATION_NAV_ENTRY_PENDING,
                  content::NotificationService::AllSources());
 }
 
 ChromeOmniboxNavigationObserver::~ChromeOmniboxNavigationObserver() {}
@@ skipping 102 matching lines @@
     OnAllLoadingFinished();  // deletes |this|!
 }
 
 void ChromeOmniboxNavigationObserver::OnAllLoadingFinished() {
   if (fetch_state_ == FETCH_SUCCEEDED) {
     AlternateNavInfoBarDelegate::Create(
         web_contents(), text_, alternate_nav_match_, match_.destination_url);
   }
   delete this;
 }