DevTools: use target-based model accessors only.

LayoutTests/http/tests/inspector-enabled/dom-storage-open.html

Index: LayoutTests/http/tests/inspector-enabled/dom-storage-open.html
diff --git a/LayoutTests/http/tests/inspector-enabled/dom-storage-open.html b/LayoutTests/http/tests/inspector-enabled/dom-storage-open.html
index 17f63d4497cb4e083e33e1419907285a3eea6c05..46f558dc3f3a101c5bae005dfbfdff1d0d129ae8 100644
--- a/LayoutTests/http/tests/inspector-enabled/dom-storage-open.html
+++ b/LayoutTests/http/tests/inspector-enabled/dom-storage-open.html
@@ -20,8 +20,8 @@ function test()
 {
     function callback()
     {
-        WebInspector.domStorageModel.enable();
-        var storages = WebInspector.domStorageModel.storages();
+        InspectorTest.domStorageModel.enable();
+        var storages = InspectorTest.domStorageModel.storages();
         for (var i = 0; i < storages.length; ++i) {
             InspectorTest.addResult("SecurityOrigin: " + storages[i].securityOrigin);
             InspectorTest.addResult("IsLocalStorage: " + storages[i].isLocalStorage);