DevTools: [Persistence] validate persistence binding.

third_party/WebKit/LayoutTests/http/tests/inspector/persistence/persistence-test.js

Index: third_party/WebKit/LayoutTests/http/tests/inspector/persistence/persistence-test.js
diff --git a/third_party/WebKit/LayoutTests/http/tests/inspector/persistence/persistence-test.js b/third_party/WebKit/LayoutTests/http/tests/inspector/persistence/persistence-test.js
index 6d8b302e0679d43bbb34fca16a9eb32a4cc2e030..65bf9c78c008bb0a66f48a7127e01bf9a87d4752 100644
--- a/third_party/WebKit/LayoutTests/http/tests/inspector/persistence/persistence-test.js
+++ b/third_party/WebKit/LayoutTests/http/tests/inspector/persistence/persistence-test.js
@@ -67,9 +67,11 @@ InspectorTest.waitForUISourceCode = function(name, projectType)
     }
 }
 
+InspectorTest.fooJSContent = "\n\nwindow.foo = ()=>'foo';";
+
 InspectorTest.addFooJSFile = function(fs)
 {
-    return fs.root.mkdir("inspector").mkdir("persistence").mkdir("resources").addFile("foo.js", "\n\nwindow.foo = ()=>'foo';");
+    return fs.root.mkdir("inspector").mkdir("persistence").mkdir("resources").addFile("foo.js", InspectorTest.fooJSContent);
 }
 
 }