The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/84234b56d641a989f709976793cff331b5488684

commit 84234b56d641a989f709976793cff331b5488684
Author: rouslan <rouslan@chromium.org>
Date: Fri May 06 04:22:53 2016

Implement PaymentRequestUpdateEvent

When onShippingAddressChange or onShippingOptionChange event fires, the
event type should be PaymentRequestUpdateEvent with an updateWith()
method.

 - The updateWith() method lets the merchant update the shipping options
   and the total price.

 - The updateWith() method cannot be called twice for the same event.

 - The updateWith() method can be called only when the event is being
   dispatched.

 - Dispatching a PaymentRequestUpdateEvent created in JavaScript is a
   no-op.

https://w3c.github.io/browser-payment-api/specs/paymentrequest.html#idl-def-paymentrequestupdateevent

BUG= 607705 

Review-Url: https://codereview.chromium.org/1931233002
Cr-Commit-Position: refs/heads/master@{#392002}

[modify] https://crrev.com/84234b56d641a989f709976793cff331b5488684/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentRequestImpl.java
[modify] https://crrev.com/84234b56d641a989f709976793cff331b5488684/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/PaymentRequestUI.java
[modify] https://crrev.com/84234b56d641a989f709976793cff331b5488684/chrome/test/data/android/payments/payment_request_no_shipping_test.html
[modify] https://crrev.com/84234b56d641a989f709976793cff331b5488684/third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt
[modify] https://crrev.com/84234b56d641a989f709976793cff331b5488684/third_party/WebKit/Source/core/frame/UseCounter.h
[modify] https://crrev.com/84234b56d641a989f709976793cff331b5488684/third_party/WebKit/Source/modules/modules.gypi
[modify] https://crrev.com/84234b56d641a989f709976793cff331b5488684/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
[modify] https://crrev.com/84234b56d641a989f709976793cff331b5488684/third_party/WebKit/Source/modules/payments/PaymentRequest.h
[modify] https://crrev.com/84234b56d641a989f709976793cff331b5488684/third_party/WebKit/Source/modules/payments/PaymentRequestTest.cpp
[add] https://crrev.com/84234b56d641a989f709976793cff331b5488684/third_party/WebKit/Source/modules/payments/PaymentRequestUpdateEvent.cpp
[add] https://crrev.com/84234b56d641a989f709976793cff331b5488684/third_party/WebKit/Source/modules/payments/PaymentRequestUpdateEvent.h
[add] https://crrev.com/84234b56d641a989f709976793cff331b5488684/third_party/WebKit/Source/modules/payments/PaymentRequestUpdateEvent.idl
[add] https://crrev.com/84234b56d641a989f709976793cff331b5488684/third_party/WebKit/Source/modules/payments/PaymentRequestUpdateEventInit.idl
[add] https://crrev.com/84234b56d641a989f709976793cff331b5488684/third_party/WebKit/Source/modules/payments/PaymentRequestUpdateEventTest.cpp
[add] https://crrev.com/84234b56d641a989f709976793cff331b5488684/third_party/WebKit/Source/modules/payments/PaymentUpdater.h
[modify] https://crrev.com/84234b56d641a989f709976793cff331b5488684/third_party/WebKit/Source/modules/payments/ShippingAddress.idl
[modify] https://crrev.com/84234b56d641a989f709976793cff331b5488684/third_party/WebKit/public/platform/modules/payments/payment_request.mojom
[modify] https://crrev.com/84234b56d641a989f709976793cff331b5488684/tools/metrics/histograms/histograms.xml

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1222c2859b500ee61b3070f4c39db4a77a16be77

commit 1222c2859b500ee61b3070f4c39db4a77a16be77
Author: rouslan <rouslan@chromium.org>
Date: Wed May 11 01:51:47 2016

Preserve the selected shipping option index.

When the user selects a shipping option, the merchant can update the
list of line items and shipping options. If the merchant sends back
unchanged shipping options, then this update should not clear user's
shipping option selection.

BUG= 607705 

Review-Url: https://codereview.chromium.org/1957973003
Cr-Commit-Position: refs/heads/master@{#392816}

[modify] https://crrev.com/1222c2859b500ee61b3070f4c39db4a77a16be77/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentRequestImpl.java