Allow inlining properties on global this object not defined in externs

PiperOrigin-RevId: 321176244

Author: blickly

src/com/google/javascript/jscomp/InlineProperties.java

@@ -61,9 +61,6 @@ private static class PropertyInfo {
   InlineProperties(AbstractCompiler compiler) {
     this.compiler = compiler;
     this.invalidatingTypes = new InvalidatingTypes.Builder(compiler.getTypeRegistry())
-        // TODO(sdh): consider allowing inlining properties of global this
-        // (we already reserve extern'd names, so this should be safe).
-        .disallowGlobalThis()
         // NOTE: Mismatches are less important to this pass than to (dis)ambiguate properties.
         // This pass doesn't remove values (it only inlines them when the type is known), so
         // it isn't necessary to invalidate due to implicit interface uses.