Revert "[Mac] Created Suggested Text Touch Bar"

This reverts commit b0bedb93eb732486e3701f3de0d11a3164d9ea79.

Reason for revert: Seemingly causing interactive_ui_tests failures.

Original change's description:
> [Mac] Created Suggested Text Touch Bar
> 
> When text is selected in a textfield, the touch bar displays options
> to replace the selected text. Clicking on one of the options will
> replace the selected text with the selected option.
> 
> Currently, there are no functional unit tests for the suggested text
> touch bar. As functionality is fleshed out, unit tests will be
> created.
> 
> A new folder (chrome/browser/ui/cocoa/touchbar) was created to house all
> files related to the Mac touch bar. The
> CreditCardAutofillTouchBarController files and the
> WebTextfieldTouchBarController files were moved to this new folder.
> Dependencies and header guards were updated to reflect this change.
> 
> New files:
>   - suggested_text_touch_bar_controller.h
>   - suggested_text_touch_bar_controller.mm
>   - suggested_text_touch_bar_controller_browsertest.mm
> Moved files:
>   - credit_card_autofill_touch_bar_controller.h
>   - credit_card_autofill_touch_bar_controller.mm
>   - credit_card_autofill_touch_bar_controller_unittest.mm
>   - web_textfield_touch_bar_controller.h
>   - web_textfield_touch_bar_controller.mm
> 
> BUILD files were updated to accomodate the change in location for the
> moved files and to include the new files.
> 
> WebContentsImpl, WebContentsDelegate, and WebContentsObserver were
> modified so that the SuggestedTextTouchBarController can observe
> TextInputManager for a change in text selection.
> 
> A feature flag SuggestedTextTouchBar was created and added to
> chrome://about so that the new touch bar is disabled by default and
> can be enabled via command line or chrome://flags with the flag
> #enable-suggested-text-touch-bar.
> 
> This CL includes the following browser tests for
> SuggestedTextTouchBarController:
>   - SetTextTest
>   - TouchBarTest
>   - TextSelectionChangedTest
> 
> Bug: 717553
> Change-Id: Iddba71339a3631a1405a37e461020345f921f817
> Reviewed-on: https://chromium-review.googlesource.com/1096443
> Commit-Queue: Tessa Nijssen <tnijssen@google.com>
> Reviewed-by: Avi Drissman <avi@chromium.org>
> Reviewed-by: Sarah Chan <spqchan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#566539}

TBR=avi@chromium.org,spqchan@chromium.org,tnijssen@google.com

Change-Id: I3e465dc39e486e8fa2a7ad4d8e4d4a03096a3ba0
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 717553
Reviewed-on: https://chromium-review.googlesource.com/1099117
Commit-Queue: John Budorick <jbudorick@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#566876}
21 files changed