See also  Issue 667563 , which states that sync-related branding might be ok to stay in Chromium builds.

For now I'll put everything behind the provider, because the code is already written.  We can always unwind this later if needed.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2c8da2b13c765261c6c4890c8386d2cdd4d74201

commit 2c8da2b13c765261c6c4890c8386d2cdd4d74201
Author: rohitrao <rohitrao@chromium.org>
Date: Tue Nov 22 15:19:53 2016

[ios] Adds BrandedImageProvider and its associated image resources.

This provider will vend images that contain embedder-specific branding.

BUG= 665967 

Review-Url: https://codereview.chromium.org/2521493003
Cr-Commit-Position: refs/heads/master@{#433862}

[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/chrome/app/theme/default_100_percent/contextual_search_header.png
[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/chrome/app/theme/default_100_percent/promo_info.png
[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/chrome/app/theme/default_100_percent/settings_info_24.png
[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/chrome/app/theme/default_200_percent/contextual_search_header.png
[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/chrome/app/theme/default_200_percent/promo_info.png
[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/chrome/app/theme/default_200_percent/settings_info_24.png
[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/chrome/app/theme/default_300_percent/contextual_search_header.png
[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/chrome/app/theme/default_300_percent/promo_info.png
[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/chrome/app/theme/default_300_percent/settings_info_24.png
[modify] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/chrome/app/theme/ios_theme_resources.grd
[modify] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/chrome/browser/providers/BUILD.gn
[modify] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/chrome/browser/providers/chromium_browser_provider.h
[modify] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/chrome/browser/providers/chromium_browser_provider.mm
[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/chrome/browser/providers/images/BUILD.gn
[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/chrome/browser/providers/images/chromium_branded_image_provider.h
[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/chrome/browser/providers/images/chromium_branded_image_provider.mm
[modify] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/public/provider/chrome/browser/BUILD.gn
[modify] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/public/provider/chrome/browser/chrome_browser_provider.h
[modify] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/public/provider/chrome/browser/chrome_browser_provider.mm
[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/public/provider/chrome/browser/images/branded_image_provider.h
[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/public/provider/chrome/browser/images/branded_image_provider.mm
[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/public/provider/chrome/browser/images/test_branded_image_provider.h
[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/public/provider/chrome/browser/images/test_branded_image_provider.mm
[add] https://crrev.com/2c8da2b13c765261c6c4890c8386d2cdd4d74201/ios/public/provider/chrome/browser/images/whats_new_icon.h

The following revision refers to this bug:
  https://chrome-internal.googlesource.com/chrome/ios_internal.git/+/1008025b2f0779e65fa8973a2bb7e00db8215a76

commit 1008025b2f0779e65fa8973a2bb7e00db8215a76
Author: rohitrao <rohitrao@google.com>
Date: Wed Nov 23 02:03:54 2016