Activate windows opened via Service Worker Clients.openWindow

content/browser/service_worker/service_worker_version.cc

Index: content/browser/service_worker/service_worker_version.cc
diff --git a/content/browser/service_worker/service_worker_version.cc b/content/browser/service_worker/service_worker_version.cc
index bc88c065e538813c7b334d87e7820d3a723e7e41..93ae88445af6973f7ca40bb310856b6c2650c28f 100644
--- a/content/browser/service_worker/service_worker_version.cc
+++ b/content/browser/service_worker/service_worker_version.cc
@@ -236,6 +236,14 @@ class OpenURLObserver : public WebContentsObserver {
 // This is only called for main frame navigations in OpenWindowOnUI().
 void DidOpenURL(const OpenURLCallback& callback, WebContents* web_contents) {
   DCHECK(web_contents);
+  WebContentsImpl* web_contents_impl =
+      static_cast<WebContentsImpl*>(web_contents);
+  // On Mac, if there are no Chrome windows open, ContentBrowserClient::OpenURL
+  // will call ui::BaseWindow::Show which opens a new window and makes it the
+  // main+key Chrome window, but won't raise it on top of other apps
+  // (https://crbug.com/470830). Since openWindow is always called from a user
+  // gesture (e.g. notification click), we should additionally raise the window.
+  web_contents_impl->Activate();
 
   RenderFrameHostImpl* rfhi =
       static_cast<RenderFrameHostImpl*>(web_contents->GetMainFrame());