IndexedDB: Add --level-db flag, and pipe through to WebIDBFactory::open.

content/browser/in_process_webkit/indexed_db_dispatcher_host.cc

 // Copyright (c) 2010 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/indexed_db_dispatcher_host.h"
 
 #include "base/command_line.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/metrics/user_metrics.h"
@@ skipping 222 matching lines @@
   uint64 quota = kDefaultQuota;
   if (Context()->IsUnlimitedStorageGranted(url) ||
       CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kUnlimitedQuotaForIndexedDB)) {
       // TODO(jorlow): For the IsUnlimitedStorageGranted case, we need some
       //       way to revoke it.
       // TODO(jorlow): Use kint64max once we think we can scale over 1GB.
       quota = 1024 * 1024 * 1024; // 1GB. More or less "unlimited".
   }
 
+  WebKit::WebIDBFactory::BackingStoreImpl backingStoreImpl
+      = WebKit::WebIDBFactory::DefaultBackingStore;
+
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kLevelDBIndexedDatabase)) {
+    backingStoreImpl = WebKit::WebIDBFactory::LevelDBBackingStore;
+  }
+
+
   Context()->GetIDBFactory()->open(
       params.name,
       new IndexedDBCallbacks<WebIDBDatabase>(this, params.response_id), origin,
-      NULL, webkit_glue::FilePathToWebString(indexed_db_path), quota);
+      NULL, webkit_glue::FilePathToWebString(indexed_db_path), quota,
+      backingStoreImpl);
 }
 
 void IndexedDBDispatcherHost::OnIDBFactoryDeleteDatabase(
     const IndexedDBHostMsg_FactoryDeleteDatabase_Params& params) {
   FilePath base_path = webkit_context_->data_path();
   FilePath indexed_db_path;
   if (!base_path.empty()) {
     indexed_db_path = base_path.Append(
         IndexedDBContext::kIndexedDBDirectory);
   }
@@ skipping 789 matching lines @@
   if (!idb_transaction)
     return;
 
   idb_transaction->didCompleteTaskEvents();
 }
 
 void IndexedDBDispatcherHost::TransactionDispatcherHost::OnDestroyed(
     int32 object_id) {
   parent_->DestroyObject(&map_, object_id);
 }