SearchBoxView now enables/disables cursor based on user interaction.

ui/views/controls/textfield/textfield_controller.cc

Index: ui/views/controls/textfield/textfield_controller.cc
diff --git a/ui/views/controls/textfield/textfield_controller.cc b/ui/views/controls/textfield/textfield_controller.cc
index 1d90f3c06df26e2a424d6d7f855530ad542ea6ae..bf5f964c3e06ebbf49b21adcd7a36b7a9f7cd7b4 100644
--- a/ui/views/controls/textfield/textfield_controller.cc
+++ b/ui/views/controls/textfield/textfield_controller.cc
@@ -19,6 +19,12 @@ bool TextfieldController::HandleMouseEvent(Textfield* sender,
   return false;
 }
 
+bool TextfieldController::HandleGestureEvent(
+    Textfield* sender,
+    const ui::GestureEvent& gesture_event) {
+  return false;
+}
+
 int TextfieldController::OnDrop(const ui::OSExchangeData& data) {
   return ui::DragDropTypes::DRAG_NONE;
 }