[Payments] Implement openWindow for service worker based payment handler

chrome/browser/android/service_tab_launcher.cc

Index: chrome/browser/android/service_tab_launcher.cc
diff --git a/chrome/browser/android/service_tab_launcher.cc b/chrome/browser/android/service_tab_launcher.cc
index d3236351f76a65ee6a73671214e9f2b0fc221c01..5840690d045471a58b643fd12584eb63552c77ca 100644
--- a/chrome/browser/android/service_tab_launcher.cc
+++ b/chrome/browser/android/service_tab_launcher.cc
@@ -65,10 +65,14 @@ void ServiceTabLauncher::LaunchTab(content::BrowserContext* browser_context,
       base::MakeUnique<TabLaunchedCallback>(callback));
   DCHECK_GE(request_id, 1);
 
-  Java_ServiceTabLauncher_launchTab(env, request_id,
-                                    browser_context->IsOffTheRecord(), url,
-                                    static_cast<int>(disposition), referrer_url,
-                                    params.referrer.policy, headers, post_data);
+  ScopedJavaLocalRef<jstring> redirect_url = ConvertUTF8ToJavaString(
+      env,
+      params.redirect_chain.empty() ? "" : params.redirect_chain.back().spec());
+
+  Java_ServiceTabLauncher_launchTab(
+      env, request_id, browser_context->IsOffTheRecord(), redirect_url, url,
+      static_cast<int>(disposition), referrer_url, params.referrer.policy,

[please use gerrit instead, 2017/05/25 14:53:27]

How is referrer_url different from redirect_url?

[gogerald1, 2017/05/25 16:53:32]

refer it here
https://cs.chromium.org/chromium/src/content/public/browser/page_navigator.h?...

It has referrer and and redirect_chain

+      headers, post_data);
 }
 
 void ServiceTabLauncher::OnTabLaunched(int request_id,