Reusing Ok/Cancel buttons for intent picker

ui/views/controls/scroll_view.cc

Index: ui/views/controls/scroll_view.cc
diff --git a/ui/views/controls/scroll_view.cc b/ui/views/controls/scroll_view.cc
index 68ee68fee3eaa8561e097be266a8ec202f448155..f055e9b4969d68bb20219113c2d8913477e05e2d 100644
--- a/ui/views/controls/scroll_view.cc
+++ b/ui/views/controls/scroll_view.cc
@@ -683,6 +683,14 @@ bool ScrollView::ScrollsWithLayers() const {
   return contents_viewport_->layer() != nullptr;
 }
 
+void ScrollView::EnableViewPortLayer() {
+  background_color_ = SK_ColorWHITE;
+  contents_viewport_->set_background(
+      Background::CreateSolidBackground(background_color_));
+  contents_viewport_->SetPaintToLayer(true);
+  contents_viewport_->layer()->SetMasksToBounds(true);
+}
+
 void ScrollView::OnLayerScrolled() {
   UpdateScrollBarPositions();
   ScrollHeader();