Plumbing blink::Interface{Provider|Registry} through WebLocalFrame's constructor.

components/plugins/renderer/webview_plugin.cc

Index: components/plugins/renderer/webview_plugin.cc
diff --git a/components/plugins/renderer/webview_plugin.cc b/components/plugins/renderer/webview_plugin.cc
index 0141ce4f6a560bc880d79f2074f227bfdafd0a6a..ec05de3a5d3e657aaee6515600e6d3a91488f4a4 100644
--- a/components/plugins/renderer/webview_plugin.cc
+++ b/components/plugins/renderer/webview_plugin.cc
@@ -253,7 +253,7 @@ WebViewPlugin::WebViewHelper::WebViewHelper(
   // consistent view of our preferences.
   content::RenderView::ApplyWebPreferences(preferences, web_view_);
   WebLocalFrame* web_frame = WebLocalFrame::create(
-      blink::WebTreeScopeType::Document, this);
+      blink::WebTreeScopeType::Document, this, nullptr, nullptr);

[Łukasz Anforowicz, 2017/01/23 23:38:16]

WebViewPlugin::WebViewHelper doesn't override interface{Provider|Registry}, so
it just inherits the default implementation from blink::WebFrameClient which
used to return nullptr.

   web_view_->setMainFrame(web_frame);
   // TODO(dcheng): The main frame widget currently has a special case.
   // Eliminate this once WebView is no longer a WebWidget.