Also, for the bottom sheet, how can we ensure that the payment handler URL is always showing? For example, we can ensure that URL occupies 50% of the line. What do you think?

(If the URL is too long, it should be truncated using the rules defined in https://www.chromium.org/Home/chromium-security/enamel#TOC-Eliding-Origin-Names-And-Hostnames.)

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	Screenshot_20171218-140542.png 203 KB View Download

That's more challenging to do, we could consider it as improvement. 

The other solution I can think of is display origin in a single line on the bottom sheet which I think is much easier to do.

here 'single' means a separate single line, like:

Pay with BobPay, test@bobpay.xyz
https://bobpay.com

That works.

Below is the screenshot to fix the override issue,

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The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/245ce226c29da9f8c2e3ab7b99d5614179beb880

commit 245ce226c29da9f8c2e3ab7b99d5614179beb880
Author: gogerald <gogerald@google.com>
Date: Fri Jan 05 19:51:08 2018

[Payments] Do not override origin for payment handler

Check comment #5 in the bug for screenshot.

Bug:  795846 
Change-Id: Ie4f55497938803ec86ed1bb2dc72ab4d1babf0ae
Reviewed-on: https://chromium-review.googlesource.com/850834
Reviewed-by: Mathieu Perreault <mathp@chromium.org>
Commit-Queue: Ganggui Tang <gogerald@chromium.org>
Cr-Commit-Position: refs/heads/master@{#527355}
[modify] https://crrev.com/245ce226c29da9f8c2e3ab7b99d5614179beb880/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentInstrument.java
[modify] https://crrev.com/245ce226c29da9f8c2e3ab7b99d5614179beb880/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/PaymentOption.java
[modify] https://crrev.com/245ce226c29da9f8c2e3ab7b99d5614179beb880/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/PaymentRequestSection.java