Remove unused packaged app window controls code.

extensions/renderer/dispatcher_delegate.h

Index: extensions/renderer/dispatcher_delegate.h
diff --git a/extensions/renderer/dispatcher_delegate.h b/extensions/renderer/dispatcher_delegate.h
index 292a50bb2875e8fa31ca104104be179995f4a4a4..5f9fdaf55d79e4ec5b322a006965955206fe29f1 100644
--- a/extensions/renderer/dispatcher_delegate.h
+++ b/extensions/renderer/dispatcher_delegate.h
@@ -35,8 +35,7 @@ class DispatcherDelegate {
   virtual void PopulateSourceMap(ResourceBundleSourceMap* source_map) {}
 
   // Requires additional modules within an extension context's module system.
-  virtual void RequireAdditionalModules(ScriptContext* context,
-                                        bool is_within_platform_app) {}
+  virtual void RequireAdditionalModules(ScriptContext* context) {}
 
   // Allows the delegate to respond to an updated set of active extensions in
   // the Dispatcher.