PlzNavigate: AppCache support.

content/common/navigation_params.h

 // 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.
 
 #ifndef CONTENT_COMMON_NAVIGATION_PARAMS_H_
 #define CONTENT_COMMON_NAVIGATION_PARAMS_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 307 matching lines @@
   // Timing of navigation events.
   NavigationTiming navigation_timing;
 
   // PlzNavigate
   // The ServiceWorkerProviderHost ID used for navigations, if it was already
   // created by the browser. Set to kInvalidServiceWorkerProviderId otherwise.
   // This parameter is not used in the current navigation architecture, where
   // it will always be equal to kInvalidServiceWorkerProviderId.
   int service_worker_provider_id;
 
+  // PlzNavigate
+  // The AppCache host id to be used to identify this navigation.
+  int appcache_host_id;

[clamy, 2016/11/25 13:32:24]

We've talked about introducing a navigation_id in the past (for example by
incrementing a global counter each time we create a NavigationRequest). I'm
wondering if we should do that and use it in lieu of having two different ids,
one for appcache and one for sw. I don't feel strongly on the question, though.

[ananta, 2016/11/28 21:36:53]

If it ok with you we can look into this for a subsequent patch. 

[clamy, 2016/11/30 17:40:22]

Acknowledged. As I mentioned, I don't feel strongly about it.

+
   // True if the navigation originated due to a user gesture.
   bool has_user_gesture;
 
 #if defined(OS_ANDROID)
   // The real content of the data: URL. Only used in Android WebView for
   // implementing LoadDataWithBaseUrl API method to circumvent the restriction
   // on the GURL max length in the IPC layer. Short data: URLs can still be
   // passed in the |CommonNavigationParams::url| field.
   std::string data_url_as_string;
 #endif
 };
 
 // Helper struct keeping track in one place of all the parameters the browser
 // needs to provide to the renderer.
 struct NavigationParams {
   NavigationParams(const CommonNavigationParams& common_params,
                    const StartNavigationParams& start_params,
                    const RequestNavigationParams& request_params);
   ~NavigationParams();
 
   CommonNavigationParams common_params;
   StartNavigationParams start_params;
   RequestNavigationParams request_params;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_NAVIGATION_PARAMS_H_