[CrOS PhoneHub] Fix crash in CrOS Linux build.

This change fix the Linux build crash caused by a DCHECK in
MetricsRecorder::OnConnectionStatusChanged()

Bug: 1106937
Change-Id: Id8b1f7f5c0bd414fa55b44234994e9c815e77750
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2574622Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Andre Le <leandre@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833873}

chromeos/components/phonehub/connection_manager_impl.cc

@@ -53,8 +53,7 @@ void ConnectionManagerImpl::MetricsRecorder::OnConnectionStatusChanged() {
     case ConnectionManager::Status::kDisconnected:
       if (prev_status == ConnectionManager::Status::kConnected) {
         UMA_HISTOGRAM_TIMES("PhoneHub.Connectivity.Duration", delta);
-      } else {
-        DCHECK(prev_status == ConnectionManager::Status::kConnecting);
+      } else if (prev_status == ConnectionManager::Status::kConnecting) {
         RecordConnectionSuccessMetric(false);
       }
       break;