Reusing Ok/Cancel buttons for intent picker

ui/views/controls/scroll_view.h

Index: ui/views/controls/scroll_view.h
diff --git a/ui/views/controls/scroll_view.h b/ui/views/controls/scroll_view.h
index 5f55c20d31b7d1bd0aeb883103ae693a73291488..897086875a09a52a57d771302204d06cafdc80cf 100644
--- a/ui/views/controls/scroll_view.h
+++ b/ui/views/controls/scroll_view.h
@@ -106,6 +106,10 @@ class VIEWS_EXPORT ScrollView : public View, public ScrollBarController {
                          bool is_page,
                          bool is_positive) override;
 
+  // Activate a Layer() for the |contents_viewport_| if the passed parameter is
+  // true or any of the children in the ScrollView contains a layer.
+  void ActivateLayer(bool force_layer_creation);
+
  private:
   friend class test::ScrollViewTestApi;
 
@@ -143,6 +147,9 @@ class VIEWS_EXPORT ScrollView : public View, public ScrollBarController {
   // Whether the ScrollView scrolls using ui::Layer APIs.
   bool ScrollsWithLayers() const;
 
+  // Whether any of the children in the |child|-rooted subtree has a layer.
+  bool ChildrenLayerCheck(View* child) const;
+
   // Callback entrypoint when hosted Layers are scrolled by the Compositor.
   void OnLayerScrolled();