Revert of [DevTools] Remove edited scripts from debugger agent, move knowledge to frontend.

LayoutTests/http/tests/inspector/workspace-test.js

Index: LayoutTests/http/tests/inspector/workspace-test.js
diff --git a/LayoutTests/http/tests/inspector/workspace-test.js b/LayoutTests/http/tests/inspector/workspace-test.js
index 64dbdf3c85f02856c765c63fe9cb2ab30b37d873..dd4c5e1688e95094ece59dcd09c949b408031892 100644
--- a/LayoutTests/http/tests/inspector/workspace-test.js
+++ b/LayoutTests/http/tests/inspector/workspace-test.js
@@ -7,9 +7,6 @@
     InspectorTest.testExcludedFolderManager = new WebInspector.ExcludedFolderManager();
     InspectorTest.testFileSystemMapping._fileSystemMappingSetting = new InspectorTest.MockSetting({});
     InspectorTest.testFileSystemMapping._excludedFoldersSetting = new InspectorTest.MockSetting({});
-
-    // testNetworkMapping does not want to know about original page resources, so we don't populate it at start.
-    InspectorTest.override(WebInspector.NetworkProject.prototype, "_populate", function() {});
 
     InspectorTest.testTargetManager = new WebInspector.TargetManager();
     InspectorTest.testWorkspace = new WebInspector.Workspace(InspectorTest.testFileSystemMapping);