DevTools: Remove LiveEditSupport.ScriptFile as it is not really needed.

Source/devtools/front_end/DebuggerModel.js

Index: Source/devtools/front_end/DebuggerModel.js
diff --git a/Source/devtools/front_end/DebuggerModel.js b/Source/devtools/front_end/DebuggerModel.js
index abcb8fb5bf7b1eda831596a220b8316c22d37377..23f45c7cc71c1d1203c3b981fe204a92f7018324 100644
--- a/Source/devtools/front_end/DebuggerModel.js
+++ b/Source/devtools/front_end/DebuggerModel.js
@@ -270,7 +270,7 @@ WebInspector.DebuggerModel.prototype = {
         function didSetBreakpoint(error, breakpointId, locations)
         {
             if (callback) {
-                var rawLocations = locations.map(WebInspector.DebuggerModel.Location.fromPayload.bind(WebInspector.DebuggerModel.Location, target));
+                var rawLocations = locations ? locations.map(WebInspector.DebuggerModel.Location.fromPayload.bind(WebInspector.DebuggerModel.Location, target)) : [];
                 callback(error ? null : breakpointId, rawLocations);
             }
         }