Add ContextMenuSourceType to views::ContextMenuController::ShowContextMenuForView.

ui/views/examples/tree_view_example.cc

Index: ui/views/examples/tree_view_example.cc
diff --git a/ui/views/examples/tree_view_example.cc b/ui/views/examples/tree_view_example.cc
index 9d1af4e6e8af0d697411c3445a09d9b363c9b434..b89155245dcd6dbf6d39686a6748c2e78258b11a 100644
--- a/ui/views/examples/tree_view_example.cc
+++ b/ui/views/examples/tree_view_example.cc
@@ -122,15 +122,17 @@ bool TreeViewExample::CanEdit(TreeView* tree_view,
   return true;
 }
 
-void TreeViewExample::ShowContextMenuForView(View* source,
-                                             const gfx::Point& point) {
+void TreeViewExample::ShowContextMenuForView(
+    View* source,
+    const gfx::Point& point,
+    ui::ContextMenuSourceType source_type) {
   ui::SimpleMenuModel context_menu_model(this);
   context_menu_model.AddItem(ID_EDIT, ASCIIToUTF16("Edit"));
   context_menu_model.AddItem(ID_REMOVE, ASCIIToUTF16("Remove"));
   context_menu_model.AddItem(ID_ADD, ASCIIToUTF16("Add"));
   context_menu_runner_.reset(new MenuRunner(&context_menu_model));
-  if (context_menu_runner_->RunMenuAt(source->GetWidget(), NULL,
-      gfx::Rect(point, gfx::Size()), MenuItemView::TOPLEFT, 0) ==
+  if (context_menu_runner_->RunContextMenuAt(source->GetWidget(), NULL,
+      gfx::Rect(point, gfx::Size()), source_type, 0) ==
       MenuRunner::MENU_DELETED)
     return;
 }