Marking M55, RBS as per bug report.

Was told to force the Intent picker to appear every time the user selected the option instead of opening the app the user chose to default to.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4f5ce82e33afe872b6959dc381925666b14a413f

commit 4f5ce82e33afe872b6959dc381925666b14a413f
Author: dfalcantara <dfalcantara@chromium.org>
Date: Thu Sep 29 21:14:47 2016

[Download Home] Various M55 adjustments

* Replace "Open externally" with "Open with..." and force a chooser to
  appear when there's more than one possibility for an app, even if the
  user has a default set.

* Replace file size display with logical size values that are smaller
  than GB

* Replace X with <-

BUG= 650451 , 650447 , 643795 

Review-Url: https://codereview.chromium.org/2359763003
Cr-Commit-Position: refs/heads/master@{#421933}

[modify] https://crrev.com/4f5ce82e33afe872b6959dc381925666b14a413f/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabIntentDataProvider.java
[modify] https://crrev.com/4f5ce82e33afe872b6959dc381925666b14a413f/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadUtils.java
[modify] https://crrev.com/4f5ce82e33afe872b6959dc381925666b14a413f/chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadHistoryItemWrapper.java
[modify] https://crrev.com/4f5ce82e33afe872b6959dc381925666b14a413f/chrome/android/java/src/org/chromium/chrome/browser/download/ui/SpaceDisplay.java
[modify] https://crrev.com/4f5ce82e33afe872b6959dc381925666b14a413f/chrome/android/java/strings/android_chrome_strings.grd
[modify] https://crrev.com/4f5ce82e33afe872b6959dc381925666b14a413f/chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadActivityTest.java

[Auto-generated comment by a script] We noticed that this issue is targeted for M-55; it appears the fix may have landed after branch point, meaning a merge might be required. Please confirm if a merge is required here - if so add Merge-Request-55 label, otherwise remove Merge-TBD label. Thanks.