[ios] Makes ToolbarController a UIViewController subclass.

Bug: 
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: Iaa72ffb49eef8c12678c62d55d4c737755ab96c9
Reviewed-on: https://chromium-review.googlesource.com/753530
Commit-Queue: Sergio Collazos <[email protected]>
Reviewed-by: Mark Cogan <[email protected]>
Cr-Commit-Position: refs/heads/master@{#514695}
diff --git a/ios/chrome/browser/metrics/BUILD.gn b/ios/chrome/browser/metrics/BUILD.gn
index 2de2160..08d4f88 100644
--- a/ios/chrome/browser/metrics/BUILD.gn
+++ b/ios/chrome/browser/metrics/BUILD.gn
@@ -152,7 +152,7 @@
     "//components/strings",
     "//ios/chrome/browser/ui",
     "//ios/chrome/browser/ui/settings",
-    "//ios/chrome/browser/ui/toolbar",
+    "//ios/chrome/browser/ui/toolbar/public",
     "//ios/chrome/browser/ui/tools_menu",
     "//ios/chrome/test/app:test_support",
     "//ios/chrome/test/earl_grey:test_support",