Session-only local storage cleared on exit.

content/browser/in_process_webkit/dom_storage_context.cc

Index: content/browser/in_process_webkit/dom_storage_context.cc
diff --git a/content/browser/in_process_webkit/dom_storage_context.cc b/content/browser/in_process_webkit/dom_storage_context.cc
index 3daa66ea5566e670c4ea27da29d7b5be03b16ec6..d86b089039ca8d3c714c09502e0b6c827abd06fa 100644
--- a/content/browser/in_process_webkit/dom_storage_context.cc
+++ b/content/browser/in_process_webkit/dom_storage_context.cc
@@ -198,6 +198,29 @@ void DOMStorageContext::DeleteDataModifiedSince(const base::Time& cutoff) {
   }
 }
 
+void DOMStorageContext::DeleteSessionOnlyData() {
+  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.
+  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));