[Chromecast] Moves persistent UMA client ID handling to common code.

chromecast/browser/metrics/platform_metrics_providers_simple.cc

Index: chromecast/browser/metrics/platform_metrics_providers_simple.cc
diff --git a/chromecast/browser/metrics/platform_metrics_providers_simple.cc b/chromecast/browser/metrics/platform_metrics_providers_simple.cc
deleted file mode 100644
index c51caa382c9f68fed3df50e30892c751dc1ff53b..0000000000000000000000000000000000000000
--- a/chromecast/browser/metrics/platform_metrics_providers_simple.cc
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chromecast/browser/metrics/platform_metrics_providers.h"
-
-namespace chromecast {
-namespace metrics {
-
-void RegisterPlatformMetricsProviders(
-    ::metrics::MetricsService* metrics_service,
-    CastService* cast_servce) {
-}
-
-const std::string GetPlatformClientID(CastService* cast_servce) {
-  return "";
-}
-
-::metrics::SystemProfileProto::Channel GetPlatformReleaseChannel(
-     CastService* cast_servce) {
-  return ::metrics::SystemProfileProto::CHANNEL_STABLE;
-}
-
-void PlatformSetClientID(CastService* cast_servce,
-                         const std::string& client_id) {
-}
-
-}  // namespace metrics
-}  // namespace chromecast