Remove use of deprecated base::ListValue::Append(Value*) overload in extensions.

chrome/browser/extensions/window_controller.h

Index: chrome/browser/extensions/window_controller.h
diff --git a/chrome/browser/extensions/window_controller.h b/chrome/browser/extensions/window_controller.h
index deb33191816ec8c652593a53c0869fcc06e7f373..1e2ac693ae87df81eaf0a814b5e98390b4a0e1db 100644
--- a/chrome/browser/extensions/window_controller.h
+++ b/chrome/browser/extensions/window_controller.h
@@ -90,10 +90,6 @@ class WindowController {
       const extensions::Extension* extension,
       int tab_index) const = 0;
 
-  // DEPRECATED: Use std::unique_ptr<api::tabs::Tab> CreateTabObject(...)
-  virtual base::DictionaryValue* CreateTabValue(
-      const extensions::Extension* extension, int tab_index) const = 0;
-
   // Returns false if the window is in a state where closing the window is not
   // permitted and sets |reason| if not NULL.
   virtual bool CanClose(Reason* reason) const = 0;