Select a more appropiate appcache based on the opener or the parent or the target frame of the new document. The change determines a 'preferred manifest url' in these cases:

* <iframe> loading, we prefer the parent frame's manifest url
* window.open() loading, we prefer the opener frame's manifest url
* href clicking to navigate a frame in place, we prefer the manifest url of the document in the frame when the navigation starts

BUG=68479
Review URL: http://codereview.chromium.org/6727006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@81801 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 23 insertions, 0 deletions

diff --git a/webkit/appcache/appcache_host.h b/webkit/appcache/appcache_host.h
index c449982..6f25a57 100644
--- a/webkit/appcache/appcache_host.h
+++ b/webkit/appcache/appcache_host.h
@@ -71,6 +71,22 @@ class AppCacheHost : public AppCacheStorage::Delegate,
   void SwapCacheWithCallback(SwapCacheCallback* callback,
                              void* callback_param);
 
+  // Called prior to the main resource load. When the system contains multiple
+  // candidates for a main resource load, the appcache preferred by the host
+  // that created this host is used to break ties.
+  void SetSpawningHostId(int spawning_process_id, int spawning_host_id);
+
+  // May return NULL if the spawning host context has been closed, or if a
+  // spawning host context was never identified.
+  const AppCacheHost* GetSpawningHost() const;
+
+  const GURL& preferred_manifest_url() const {
+    return preferred_manifest_url_;
+  }
+  void set_preferred_manifest_url(const GURL& url) {
+    preferred_manifest_url_ = url;
+  }
+
   // Support for loading resources out of the appcache.
   // May return NULL if the request isn't subject to retrieval from an appache.
   AppCacheRequestHandler* CreateRequestHandler(
@@ -149,6 +165,13 @@ class AppCacheHost : public AppCacheStorage::Delegate,
   // Identifies the corresponding appcache host in the child process.
   int host_id_;
 
+  // Information about the host that created this one; the manifest
+  // preferred by our creator influences which cache our main resource
+  // should be loaded from.
+  int spawning_host_id_;
+  int spawning_process_id_;
+  GURL preferred_manifest_url_;
+
   // Hosts for dedicated workers are special cased to shunt
   // request handling off to the dedicated worker's parent.
   // The scriptable api is not accessible in dedicated workers