[Web Payments] Add data attribution string to dialog

chrome/browser/payments/chrome_payment_request_delegate.h

Index: chrome/browser/payments/chrome_payment_request_delegate.h
diff --git a/chrome/browser/payments/chrome_payment_request_delegate.h b/chrome/browser/payments/chrome_payment_request_delegate.h
index b93a417889f407304f099d26144c4912f26fefb2..41b7b041a77ea6479e776abcee5688535245ecb8 100644
--- a/chrome/browser/payments/chrome_payment_request_delegate.h
+++ b/chrome/browser/payments/chrome_payment_request_delegate.h
@@ -41,6 +41,8 @@ class ChromePaymentRequestDelegate : public PaymentRequestDelegate {
   AddressNormalizer* GetAddressNormalizer() override;
   autofill::RegionDataLoader* GetRegionDataLoader() override;
   ukm::UkmService* GetUkmService() override;
+  std::string GetAuthenticatedEmail() const override;
+  void MarkFirstTransactionAsCompleted() override;

[Mathieu, 2017/05/11 01:08:37]

Would prefer GetPrefService here, which we could reuse later.

[anthonyvd, 2017/05/11 13:24:42]

Nice, done.

 
  protected:
   // Reference to the dialog so that we can satisfy calls to CloseDialog(). This