Fix Views Combobox and TreeView input minimally.

ui/views/controls/tree/tree_view.cc

Index: ui/views/controls/tree/tree_view.cc
diff --git a/ui/views/controls/tree/tree_view.cc b/ui/views/controls/tree/tree_view.cc
index 1d550a2ff75b849947c3e67e19514f9befc3c497..0157902fad450420106a9f8c0610d10be5b1e9b1 100644
--- a/ui/views/controls/tree/tree_view.cc
+++ b/ui/views/controls/tree/tree_view.cc
@@ -598,6 +598,7 @@ void TreeView::OnPaint(gfx::Canvas* canvas) {
 }
 
 void TreeView::OnFocus() {
+  GetInputMethod()->OnFocus();
   View::OnFocus();
   SchedulePaintForNode(selected_node_);
 
@@ -607,6 +608,7 @@ void TreeView::OnFocus() {
 }
 
 void TreeView::OnBlur() {
+  GetInputMethod()->OnBlur();
   SchedulePaintForNode(selected_node_);
   if (selector_)
     selector_->OnViewBlur();