Implement WebContentsViewChildFrame::TakeFocus.

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 deee5480624927d91392edcc4f98dc3d9a510024..bd9e469964ba2480908b2c4acd3679f9ece85571 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -4735,6 +4735,13 @@ void WebContentsImpl::SetAsFocusedWebContentsIfNecessary() {
   // and focus this contents to activate it.
   if (old_contents)
     old_contents->GetMainFrame()->GetRenderWidgetHost()->SetPageFocus(false);
+
+  // Make sure the outer web contents knows our frame is focused. Otherwise, the
+  // outer renderer could have the element before or after the frame element
+  // focused which would return early without actually advancing focus.
+  if (GetRenderManager()->GetProxyToOuterDelegate())
+    GetRenderManager()->GetProxyToOuterDelegate()->SetFocusedFrame();
+
   GetMainFrame()->GetRenderWidgetHost()->SetPageFocus(true);
   GetOutermostWebContents()->node_->SetFocusedWebContents(this);
 }