Upstream Chrome on iOS source code [2/11].

ios/chrome/browser/payments/payment_request_web_state_observer.mm

Index: ios/chrome/browser/payments/payment_request_web_state_observer.mm
diff --git a/ios/chrome/browser/payments/payment_request_web_state_observer.mm b/ios/chrome/browser/payments/payment_request_web_state_observer.mm
new file mode 100644
index 0000000000000000000000000000000000000000..f8c2b230003b448fcd8c648653d276d4d0d2d804
--- /dev/null
+++ b/ios/chrome/browser/payments/payment_request_web_state_observer.mm
@@ -0,0 +1,22 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import "ios/chrome/browser/payments/payment_request_web_state_observer.h"
+
+PaymentRequestWebStateObserver::PaymentRequestWebStateObserver(
+    id<PaymentRequestWebStateDelegate> delegate)
+    : web::WebStateObserver(), delegate_(delegate) {}
+
+PaymentRequestWebStateObserver::~PaymentRequestWebStateObserver() {}
+
+void PaymentRequestWebStateObserver::ObserveWebState(web::WebState* web_state) {
+  Observe(web_state);
+}
+
+void PaymentRequestWebStateObserver::PageLoaded(
+    web::PageLoadCompletionStatus load_completion_status) {
+  if ([delegate_ respondsToSelector:@selector(pageLoadedWithStatus:)]) {
+    [delegate_ pageLoadedWithStatus:load_completion_status];
+  }
+}