Add CanMinimize to classes that implement WidgetDelegate::CanMaximize.

components/native_app_window/native_app_window_views.cc

Index: components/native_app_window/native_app_window_views.cc
diff --git a/components/native_app_window/native_app_window_views.cc b/components/native_app_window/native_app_window_views.cc
index 766b08861985b3e0f2d40f7a9f41afdc9801a11d..5f0f0160fde2650f78844352547b334ef888b317 100644
--- a/components/native_app_window/native_app_window_views.cc
+++ b/components/native_app_window/native_app_window_views.cc
@@ -218,6 +218,11 @@ bool NativeAppWindowViews::CanMaximize() const {
          !app_window_->window_type_is_panel() && !WidgetHasHitTestMask();
 }
 
+bool NativeAppWindowViews::CanMinimize() const {
+  // TODO(jackhou): Change this to always be true.
+  return CanMaximize();
+}
+
 base::string16 NativeAppWindowViews::GetWindowTitle() const {
   return app_window_->GetTitle();
 }