Revert "Show Variations info in cmd format in about:version."

This reverts commit 5b240cfb0644278915664861fd0ec04185dd0bc4.

Reason for revert: breaking tests on iOS bot:

https://ci.chromium.org/buildbot/chromium.mac/ios-simulator-full-configs/2677

VisibleURLTestCase/testDoubleForwardNavigationToWebUIPage:
[0201/113634.854499:FATAL:template_expressions.cc(97)] Check failed: value != replacements.end(). $i18n replacement key "variations_cmd_name" not found

Original change's description:
> Show Variations info in cmd format in about:version.
> 
> When navigating to about:version/?show-variations-cmd an additional section
> will appear showing complete set of client's variations in the command line
> formatting that can be used to reproduce the same exact state of variations.
> The displayed info contains all the trials including not activated ones
> marked by '*' along with the corresponding group assignment.
> It will also contain enabled and disabled features where the ones that should
> use the default value will be marked with '*'(e.g. expired trials).
> Trials that are unforcable through command line will be shown but warning will
> be shown when processing the command line input with unforcable trial.
> This CL doesn't cover iOS.
> 
> As the displayed text is huge I also changed the width of the text in the
> about:version page (not mobile) to be 60% of the page with a minimum of 800px
> as it used to be.
> 
> Bug: 694675
> TEST=unit test, manual testing
> 1. run chrome with --fake-variations-channel=beta
> 2. copying command line input from about:version/?show-variations-cmd
> 3. run chrome without channel but with command line input copied in step 2.
> 4. confirm about:version/?show-variations-cmd page shows the same info
> 
> Change-Id: Ie73174bd5bd1a02baa75cd3294fd36cf63b3c923
> Reviewed-on: https://chromium-review.googlesource.com/865286
> Commit-Queue: Gayane Petrosyan <gayane@chromium.org>
> Reviewed-by: Dave Schuyler <dschuyler@chromium.org>
> Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#533742}

TBR=asvitkine@chromium.org,gayane@chromium.org,dschuyler@chromium.org

Change-Id: I81dd667cfde45c209eed9889c0785fc0587b123d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 694675
Reviewed-on: https://chromium-review.googlesource.com/898405
Reviewed-by: Tommy Steimel <steimel@chromium.org>
Commit-Queue: Tommy Steimel <steimel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533844}

CrOS-Libchrome-Original-Commit: 6788e47ad67b94f8423714617798aa57da54db46
3 files changed
tree: b76032f199e47a56662083939c82dfc79df0de09
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/