Convert startup_metric_utils to use mojo.

BUG=577685
[email protected]

Committed: https://crrev.com/089f995b33d52e072a1a00c0302116fb9d4e49fb
Review-Url: https://codereview.chromium.org/2022413002
Cr-Original-Commit-Position: refs/heads/master@{#398781}
Cr-Commit-Position: refs/heads/master@{#398831}
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index d4ceb56..4eb706ea 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -175,8 +175,8 @@
     "//components/security_state",
     "//components/signin/core/browser",
     "//components/ssl_errors",
+    "//components/startup_metric_utils/browser:host",
     "//components/startup_metric_utils/browser:lib",
-    "//components/startup_metric_utils/browser:message_filter_lib",
 
     # TODO(fdoray): Remove this once the PreRead field trial has expired.
     # crbug.com/577698