views/examples: Make SingleSplitViewExample a listener of SingleSplitView control.

views/examples/single_split_view_example.cc

Index: views/examples/single_split_view_example.cc
diff --git a/views/examples/single_split_view_example.cc b/views/examples/single_split_view_example.cc
index 35932c79bcaf23799acffff2bd4b77a9123e9300..46047c408d96500d4cbe71f7edefd175655cc1ae 100644
--- a/views/examples/single_split_view_example.cc
+++ b/views/examples/single_split_view_example.cc
@@ -69,7 +69,7 @@ void SingleSplitViewExample::CreateExampleView(views::View* container) {
   single_split_view_ = new views::SingleSplitView(
       splitted_view_1, splitted_view_2,
       views::SingleSplitView::HORIZONTAL_SPLIT,
-      NULL);
+      this);
 
   views::GridLayout* layout = new views::GridLayout(container);
   container->SetLayoutManager(layout);
@@ -81,4 +81,9 @@ void SingleSplitViewExample::CreateExampleView(views::View* container) {
   layout->AddView(single_split_view_);
 }
 
+bool SingleSplitViewExample::SplitHandleMoved(views::SingleSplitView* sender) {
+  PrintStatus("Splitter moved");
+  return true;
+}
+
 }  // namespace examples