Give up focus if the focused view becomes unfocusable

ui/views/controls/webview/webview.cc

Index: ui/views/controls/webview/webview.cc
diff --git a/ui/views/controls/webview/webview.cc b/ui/views/controls/webview/webview.cc
index 630ed48558c77e56bcae8244a15500e38ef2aa29..3e07f6f42322810d6eeceb809167c672b579d282 100644
--- a/ui/views/controls/webview/webview.cc
+++ b/ui/views/controls/webview/webview.cc
@@ -58,6 +58,7 @@ void WebView::SetWebContents(content::WebContents* replacement) {
   DetachWebContents();
   WebContentsObserver::Observe(replacement);
   // web_contents() now returns |replacement| from here onwards.
+  SetFocusable(!!web_contents());
   if (wc_owner_ != replacement)
     wc_owner_.reset();
   if (embed_fullscreen_widget_mode_enabled_) {
@@ -198,12 +199,6 @@ bool WebView::SkipDefaultKeyEventProcessing(const ui::KeyEvent& event) {
   return web_contents() && !web_contents()->IsCrashed();
 }
 
-bool WebView::IsFocusable() const {
-  // We need to be focusable when our contents is not a view hierarchy, as
-  // clicking on the contents needs to focus us.
-  return !!web_contents();
-}
-
 void WebView::OnFocus() {
   if (web_contents())
     web_contents()->Focus();