Merge //ios/chrome/browser/ui:ui_arc with //ios/chrome/browser/ui.

Since both targets require ARC and //ios/chrome/browser/ui has a
public_deps on //ios/chrome/browser/ui:ui_arc, the separation is
no longer necessary.

BUG=624363

Review-Url: https://codereview.chromium.org/2617603003
Cr-Commit-Position: refs/heads/master@{#441756}
1 file changed