[DevTools] Add "remoteModules" experiment.

Source/devtools/front_end/Runtime.js

Index: Source/devtools/front_end/Runtime.js
diff --git a/Source/devtools/front_end/Runtime.js b/Source/devtools/front_end/Runtime.js
index 53b8d4415b31f2eae7851e23a4349530c77d296e..fa67360df1ef9bd06d85852424df6546d08b6816 100644
--- a/Source/devtools/front_end/Runtime.js
+++ b/Source/devtools/front_end/Runtime.js
@@ -732,7 +732,8 @@ Runtime.Module.prototype = {
             return Promise.resolve();
 
         if (Runtime.isReleaseMode()) {
-            var base = this._descriptor.remote && Runtime._remoteBase || undefined;
+            var useRemote = this._descriptor.remote && Runtime.experiments.isEnabled("remoteModules");
+            var base = useRemote && Runtime._remoteBase || undefined;
             return loadScriptsPromise([this._name + "_module.js"], base);
         }
 
@@ -1059,6 +1060,7 @@ Runtime.Experiment.prototype = {
 
 // This must be constructed after the query parameters have been parsed.
 Runtime.experiments = new Runtime.ExperimentsSupport();
+Runtime.experiments.register("remoteModules", "Remote Modules", true);
 
 /**
  * @type {?string}