Avoid leaking TestWebIDBFactory instances, and reset

webkit/support/test_webkit_platform_support.cc

 // Copyright (c) 2012 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 "webkit/support/test_webkit_platform_support.h"
 
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/metrics/stats_counters.h"
 #include "base/path_service.h"
@@ skipping 387 matching lines @@
     if (!factory_)
       factory_.reset(WebKit::WebIDBFactory::create());
   }
 
   scoped_ptr<WebIDBFactory> factory_;
   base::ScopedTempDir indexed_db_dir_;
   WebString data_dir_;
 };
 
 WebKit::WebIDBFactory* TestWebKitPlatformSupport::idbFactory() {
-  return new TestWebIDBFactory();
+  if (!idb_factory_)
+    idb_factory_.reset(new TestWebIDBFactory());
+  return idb_factory_.get();
 }
 
 #if defined(OS_WIN) || defined(OS_MACOSX)
 void TestWebKitPlatformSupport::SetThemeEngine(WebKit::WebThemeEngine* engine) {
   active_theme_engine_ = engine ?
       engine : WebKitPlatformSupportImpl::themeEngine();
 }
 
 WebKit::WebThemeEngine* TestWebKitPlatformSupport::themeEngine() {
   return active_theme_engine_;
@@ skipping 185 matching lines @@
   return 0;
 }
 
 WebKit::WebGestureCurve* TestWebKitPlatformSupport::createFlingAnimationCurve(
     int device_source,
     const WebKit::WebFloatPoint& velocity,
     const WebKit::WebSize& cumulative_scroll) {
   // Caller will retain and release.
   return new WebGestureCurveMock(velocity, cumulative_scroll);
 }
+
+void TestWebKitPlatformSupport::ResetIDBFactory() {
+  idb_factory_.reset();
+}