PlzNavigate: AppCache support.

content/browser/appcache/appcache_backend_impl.h

Index: content/browser/appcache/appcache_backend_impl.h
diff --git a/content/browser/appcache/appcache_backend_impl.h b/content/browser/appcache/appcache_backend_impl.h
index e7f9b84eb288987c13a37f758f7c0273c6a08d51..1d92f47a5c518d4afbca62690eaf4e8994d25890 100644
--- a/content/browser/appcache/appcache_backend_impl.h
+++ b/content/browser/appcache/appcache_backend_impl.h
@@ -22,10 +22,15 @@ class CONTENT_EXPORT AppCacheBackendImpl {
 
   void Initialize(AppCacheServiceImpl* service,
                   AppCacheFrontend* frontend,
-                  int process_id);
+                  int process_id,
+                  int frame_id);
 
+  void set_process_id(int pid) { process_id_ = pid; }
   int process_id() const { return process_id_; }
 
+  void set_frame_id(int id) { frame_id_ = id; }
+  int frame_id() const { return frame_id_; }
+
   // Methods to support the AppCacheBackend interface. A false return
   // value indicates an invalid host_id and that no action was taken
   // by the backend impl.
@@ -66,10 +71,24 @@ class CONTENT_EXPORT AppCacheBackendImpl {
   std::unique_ptr<AppCacheHost> TransferHostOut(int host_id);
   void TransferHostIn(int new_host_id, std::unique_ptr<AppCacheHost> host);
 
+  // PlzNavigate:
+  // When a navigation commits, we need to switch the AppCacheFrontend and
+  // possibly the AppCacheServiceImpl instance we are registered with.

[michaeln, 2016/11/22 00:17:27]

under what circumstances would we need to swap the appcacheService?

[ananta, 2016/11/23 04:05:14]

IsolatedApps is one case. Need to look into why that happens. This  function has
been removed though.

+  void FrameNavigationCommitted(AppCacheFrontend* frontend,
+                                AppCacheServiceImpl* service);
+
+  // PlzNavigate:
+  // Copies hosts registered with the AppCacheBackend passed in the |backend|
+  // parameter.
+  void CopyExistingHosts(AppCacheBackendImpl* backend);
+
  private:
   AppCacheServiceImpl* service_;
   AppCacheFrontend* frontend_;
   int process_id_;
+  // For PlzNavigate, this contains the frame id when the navigation is
+  // initiated.
+  int frame_id_;
   HostMap hosts_;
 
   DISALLOW_COPY_AND_ASSIGN(AppCacheBackendImpl);