Add WebContentObserver::OnWebContentsLostFocus()

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index c0369142836fa3dc09a86ca9fdd1f2e2bfdc35a6..c24757d5ed8f30eacd541e2ac30859dc762229da 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -800,6 +800,10 @@ void RenderWidgetHostImpl::Blur() {
   if (!focused_widget)
     focused_widget = this;
   focused_widget->SetPageFocus(false);
+  if (owner_delegate_)
+    owner_delegate_->RenderWidgetBlured();
+  if (delegate_)
+    delegate_->RenderWidgetBlured(this);
 }
 
 void RenderWidgetHostImpl::SetPageFocus(bool focused) {