DevTools: Bring Sass support from behind the experiment

LayoutTests/http/tests/inspector/compiler-script-mapping.html

Index: LayoutTests/http/tests/inspector/compiler-script-mapping.html
diff --git a/LayoutTests/http/tests/inspector/compiler-script-mapping.html b/LayoutTests/http/tests/inspector/compiler-script-mapping.html
index 29c4177349393af922f37bdc042f5cd1e294196c..cc9eb5e2923bd5f919d765f5a09a4d33d4ab0886 100644
--- a/LayoutTests/http/tests/inspector/compiler-script-mapping.html
+++ b/LayoutTests/http/tests/inspector/compiler-script-mapping.html
@@ -314,7 +314,7 @@ function test()
 
         function testSourceMapCouldNotBeLoaded(next)
         {
-            WebInspector.settings.sourceMapsEnabled.set(true);
+            WebInspector.settings.jsSourceMapsEnabled.get = function() { return true; }
             WebInspector.debuggerModel._reset();
             InspectorTest.createWorkspace();
             var debuggerScriptMapping = new WebInspector.DebuggerScriptMapping(InspectorTest.testWorkspace, InspectorTest.testNetworkWorkspaceProvider);