Change MojoWebUIController to use mojo::StrongBindingSet.

chrome/browser/ui/webui/omnibox/omnibox_ui.cc

Index: chrome/browser/ui/webui/omnibox/omnibox_ui.cc
diff --git a/chrome/browser/ui/webui/omnibox/omnibox_ui.cc b/chrome/browser/ui/webui/omnibox/omnibox_ui.cc
index cb02a8973b7c8c15c66931bb2515156802791294..0a38670bd1d73025fc139599f1a8a5215ebbb682 100644
--- a/chrome/browser/ui/webui/omnibox/omnibox_ui.cc
+++ b/chrome/browser/ui/webui/omnibox/omnibox_ui.cc
@@ -26,10 +26,4 @@ OmniboxUI::OmniboxUI(content::WebUI* web_ui) : MojoWebUIController(web_ui) {
   content::WebUIDataSource::Add(Profile::FromWebUI(web_ui), source);
 }
 
-OmniboxUI::~OmniboxUI() {}
-
-void OmniboxUI::BindUIHandler(
-    mojo::InterfaceRequest<OmniboxUIHandlerMojo> request) {
-  // OmniboxUIHandler deletes itself when the pipe is closed.
-  new OmniboxUIHandler(Profile::FromWebUI(web_ui()), request.Pass());
-}
+OmniboxUI::~OmniboxUI() = default;