views: Make view::Views::GetPreferredSize() const.

ui/app_list/views/search_result_list_view.cc

Index: ui/app_list/views/search_result_list_view.cc
diff --git a/ui/app_list/views/search_result_list_view.cc b/ui/app_list/views/search_result_list_view.cc
index 924cec4c85db0106e941a7f9bd0ea84d19eac25e..19fb584607fb3c7fcf665fc3e3d3584f7bc7c692 100644
--- a/ui/app_list/views/search_result_list_view.cc
+++ b/ui/app_list/views/search_result_list_view.cc
@@ -198,11 +198,11 @@ void SearchResultListView::Layout() {
   results_container_->SetBoundsRect(GetLocalBounds());
 }
 
-gfx::Size SearchResultListView::GetPreferredSize() {
+gfx::Size SearchResultListView::GetPreferredSize() const {
   return results_container_->GetPreferredSize();
 }
 
-int SearchResultListView::GetHeightForWidth(int w) {
+int SearchResultListView::GetHeightForWidth(int w) const {
   return results_container_->GetHeightForWidth(w);
 }