Appcache, local storage, indexed db, databases: skip exit-time deletion when restarting.

content/browser/in_process_webkit/dom_storage_context.h

Index: content/browser/in_process_webkit/dom_storage_context.h
diff --git a/content/browser/in_process_webkit/dom_storage_context.h b/content/browser/in_process_webkit/dom_storage_context.h
index 84acb5ba83f7f2a01f5e9484d87be7b0221a3b4a..f084024358410d67c4e0c1b3d95a6bc888ca4b68 100644
--- a/content/browser/in_process_webkit/dom_storage_context.h
+++ b/content/browser/in_process_webkit/dom_storage_context.h
@@ -109,6 +109,11 @@ class CONTENT_EXPORT DOMStorageContext {
     clear_local_state_on_exit_ = clear_local_state;
   }
 
+  // Disables the exit-time deletion for all data (also session-only data).
+  void SaveSessionState() {
+    save_session_state_ = true;
+  }
+
   void set_data_path_for_testing(const FilePath& data_path) {
     data_path_ = data_path;
   }
@@ -116,6 +121,7 @@ class CONTENT_EXPORT DOMStorageContext {
  private:
 
   FRIEND_TEST_ALL_PREFIXES(DOMStorageTest, SessionOnly);
+  FRIEND_TEST_ALL_PREFIXES(DOMStorageTest, SaveSessionState);
 
   // Get the local storage instance.  The object is owned by this class.
   DOMStorageNamespace* CreateLocalStorage();
@@ -145,6 +151,9 @@ class CONTENT_EXPORT DOMStorageContext {
   // True if the destructor should delete its files.
   bool clear_local_state_on_exit_;
 
+  // If true, nothing (not even session-only data) should be deleted on exit.
+  bool save_session_state_;
+
   // Path where the browser context data is stored.
   // TODO(pastarmovj): Keep in mind that unlike indexed db data_path_ variable
   // this one still has to point to the upper level dir because of the