GitLab

Adds an GetIconColor method to ToolbarIconContainerView and a method to
override it. The latter is used by WebAppFrameToolbarView to set the
icon color.

Before this the icon color was never set for the container hosted inside
WebAppFrameToolbarView so the icon image was never loaded -> never
visible.

Bug: chromium:1006162
Change-Id: Ic3566461f1bd7319944060db766b91ac38adef87
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1900090
Commit-Queue: Caroline Rising <corising@chromium.org>
Reviewed-by: Caroline Rising <corising@chromium.org>
Auto-Submit: Peter Boström <pbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712753}