Use explicit WebString <-> string16 conversion methods in storage API files

content/child/indexed_db/webidbfactory_impl.cc

Index: content/child/indexed_db/webidbfactory_impl.cc
diff --git a/content/child/indexed_db/webidbfactory_impl.cc b/content/child/indexed_db/webidbfactory_impl.cc
index 7d11079ec3d6a7f196ed73c39127f9f0c75908e4..4661026eff251f92270e89abcdbc1674f45da664 100644
--- a/content/child/indexed_db/webidbfactory_impl.cc
+++ b/content/child/indexed_db/webidbfactory_impl.cc
@@ -88,7 +88,7 @@ void WebIDBFactoryImpl::open(const WebString& name,
   io_runner_->PostTask(
       FROM_HERE,
       base::Bind(&IOThreadHelper::Open, base::Unretained(io_helper_),
-                 base::string16(name), version, transaction_id,
+                 name.utf16(), version, transaction_id,
                  base::Passed(&callbacks_impl),
                  base::Passed(&database_callbacks_impl), url::Origin(origin)));
 }
@@ -102,7 +102,7 @@ void WebIDBFactoryImpl::deleteDatabase(const WebString& name,
   io_runner_->PostTask(
       FROM_HERE,
       base::Bind(&IOThreadHelper::DeleteDatabase, base::Unretained(io_helper_),
-                 base::string16(name), base::Passed(&callbacks_impl),
+                 name.utf16(), base::Passed(&callbacks_impl),
                  url::Origin(origin)));
 }