Add WebContentObserver::OnWebContentsLostFocus()

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 41778bf796aa7223f8ca8e384db023cb4509de19..b8670a91af7e718be096b1e31d1eaa2034c9e949 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -1862,6 +1862,11 @@ void WebContentsImpl::RenderWidgetGotFocus(
   }
 }
 
+void WebContentsImpl::RenderWidgetLostFocus(
+    RenderWidgetHostImpl* render_widget_host) {
+  NotifyWebContentsLostFocus();
+}
+
 void WebContentsImpl::RenderWidgetWasResized(
     RenderWidgetHostImpl* render_widget_host,
     bool width_changed) {
@@ -3295,6 +3300,11 @@ void WebContentsImpl::NotifyWebContentsFocused() {
     observer.OnWebContentsFocused();
 }
 
+void WebContentsImpl::NotifyWebContentsLostFocus() {
+  for (auto& observer : observers_)
+    observer.OnWebContentsLostFocus();
+}
+
 void WebContentsImpl::SystemDragEnded(RenderWidgetHost* source_rwh) {
   if (source_rwh)
     source_rwh->DragSourceSystemDragEnded();