Session-only local storage cleared on exit.

content/browser/in_process_webkit/dom_storage_context.cc

 // Copyright (c) 2011 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.
 
 #include "content/browser/in_process_webkit/dom_storage_context.h"
 
 #include <algorithm>
 
 #include "base/file_path.h"
 #include "base/file_util.h"
@@ skipping 180 matching lines @@
     if (special_storage_policy_->IsStorageProtected(origin))
       continue;
 
     file_util::FileEnumerator::FindInfo find_info;
     file_enumerator.GetFindInfo(&find_info);
     if (file_util::HasFileBeenModifiedSince(find_info, cutoff))
       file_util::Delete(path, false);
   }
 }
 
+void DOMStorageContext::DeleteSessionOnlyData() {

[michaeln, 2011/08/17 19:16:41]

maybe DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT));

[marja, 2011/08/18 11:22:14]

Done.

+  // Make sure that we don't delete a database that's currently being accessed
+  // by unloading all of the databases temporarily.
+  PurgeMemory();
+
+  file_util::FileEnumerator file_enumerator(
+      data_path_.Append(kLocalStorageDirectory), false,
+      file_util::FileEnumerator::FILES);
+  for (FilePath path = file_enumerator.Next(); !path.value().empty();
+       path = file_enumerator.Next()) {
+    GURL origin(WebSecurityOrigin::createFromDatabaseIdentifier(
+        webkit_glue::FilePathToWebString(path.BaseName())).toString());
+    if (!special_storage_policy_->IsStorageSessionOnly(origin))
+      continue;
+    if (special_storage_policy_->IsStorageProtected(origin))
+      continue;
+
+    file_util::Delete(path, false);
+  }
+}
+
 void DOMStorageContext::DeleteLocalStorageFile(const FilePath& file_path) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT));
 
   // Make sure that we don't delete a database that's currently being accessed
   // by unloading all of the databases temporarily.
   // TODO(bulach): both this method and DeleteDataModifiedSince could purge
   // only the memory used by the specific file instead of all memory at once.
   // See http://crbug.com/32000
   PurgeMemory();
   file_util::Delete(file_path, false);
@@ skipping 59 matching lines @@
 }
 
 FilePath DOMStorageContext::GetLocalStorageFilePath(
     const string16& origin_id) const {
   FilePath storageDir = data_path_.Append(
       DOMStorageContext::kLocalStorageDirectory);
   FilePath::StringType id =
       webkit_glue::WebStringToFilePathString(origin_id);
   return storageDir.Append(id.append(kLocalStorageExtension));
 }