Making the focus remembering across tab switch work.

views/controls/native/native_view_host.cc

Index: views/controls/native/native_view_host.cc
diff --git a/views/controls/native/native_view_host.cc b/views/controls/native/native_view_host.cc
index e6637a929585d4ae7e67cfbe28d71a2a693daca4..9cbeaf73adea45d4eb850b05c4be56c2adbebc82 100644
--- a/views/controls/native/native_view_host.cc
+++ b/views/controls/native/native_view_host.cc
@@ -33,6 +33,10 @@ NativeViewHost::~NativeViewHost() {
 void NativeViewHost::Attach(gfx::NativeView native_view) {
   DCHECK(!native_view_);
   native_view_ = native_view;
+  // If set_focus_view() has not been invoked, this view is the one that should
+  // be seen as focused when the native view receives focus.
+  if (!focus_view_)
+    focus_view_ = this;
   native_wrapper_->NativeViewAttached();
 }