Session restore: Store and restore persistent IDs for sessionStorage.

content/public/browser/dom_storage_context.h

Index: content/public/browser/dom_storage_context.h
diff --git a/content/public/browser/dom_storage_context.h b/content/public/browser/dom_storage_context.h
index 40d6387097dad785c32c3dd71ff8516a864187be..309fc844bab23d37da00bc18fb337096c06d3424 100644
--- a/content/public/browser/dom_storage_context.h
+++ b/content/public/browser/dom_storage_context.h
@@ -17,6 +17,7 @@ class GURL;
 namespace content {
 
 class BrowserContext;
+class SessionStorageNamespace;
 
 // Represents the per-BrowserContext Local Storage data.
 class DOMStorageContext {
@@ -31,6 +32,13 @@ class DOMStorageContext {
   // Deletes the local storage data for the given origin.
   virtual void DeleteOrigin(const GURL& origin) = 0;
 
+  // Creates a SessionStorageNamespace with the given |persistent_id|. Used
+  // after tabs are restored by session restore. When created, the
+  // SessionStorageNamespace with the correct |persistent_id| will be
+  // associated with the persisted sessionStorage data.
+  virtual scoped_refptr<SessionStorageNamespace> RecreateSessionStorage(
+      const std::string& persistent_id) = 0;
+
  protected:
   virtual ~DOMStorageContext() {}
 };