GitLab

Architecture:
Superclass - scannerView
Subclasses - qrScannerView

Files just renamed and shifted to scanner directory:
- camera_controller
- qr_scanner_alerts
- qr_transitioning_delegate
- qr_scanner_presenting

Bug: 990744

Change-Id: I3fddd13f05e1a2bdd5de239c32f86979399eb925
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1741974
Commit-Queue: Tanisha Mandre <tanishamandre@google.com>
Reviewed-by: Eric Noyau <noyau@chromium.org>
Reviewed-by: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#688254}