[DevTools] Turn remote modules into local with debug_devtools.

Currently, it's impossible to work on remote module as it tries to load source from the cloud.

BUG=none

Review-Url: https://codereview.chromium.org/2324633002
Cr-Commit-Position: refs/heads/master@{#417158}

third_party/WebKit/Source/devtools/front_end/Runtime.js

@@ -786,7 +786,7 @@ Runtime.Module.prototype = {
      */
     _remoteBase: function()
     {
-        return this._descriptor.remote && Runtime._remoteBase || undefined;
+        return !Runtime.queryParam("debugFrontend") && this._descriptor.remote && Runtime._remoteBase || undefined;
     },
 
     /**