Introduce MetricsServiceClient and ChromeMetricsServiceClient.

chrome/browser/metrics/chrome_metrics_service_client.cc

+// 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 "chrome/browser/metrics/chrome_metrics_service_client.h"
+
+#include "base/logging.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/google/google_util.h"
+#include "chrome/browser/ui/browser_otr_state.h"
+#include "chrome/common/chrome_version_info.h"
+#include "chrome/common/crash_keys.h"
+
+namespace {
+
+metrics::SystemProfileProto::Channel AsProtobufChannel(
+    chrome::VersionInfo::Channel channel) {
+  switch (channel) {
+    case chrome::VersionInfo::CHANNEL_UNKNOWN:
+      return metrics::SystemProfileProto::CHANNEL_UNKNOWN;
+    case chrome::VersionInfo::CHANNEL_CANARY:
+      return metrics::SystemProfileProto::CHANNEL_CANARY;
+    case chrome::VersionInfo::CHANNEL_DEV:
+      return metrics::SystemProfileProto::CHANNEL_DEV;
+    case chrome::VersionInfo::CHANNEL_BETA:
+      return metrics::SystemProfileProto::CHANNEL_BETA;
+    case chrome::VersionInfo::CHANNEL_STABLE:
+      return metrics::SystemProfileProto::CHANNEL_STABLE;
+    default:

[Ilya Sherman, 2014/05/19 11:02:37]

nit: Please remove the default case, so that the compiler can issue a
compile-time error if a new enum member is ever added.

[Alexei Svitkine (slow), 2014/05/19 11:34:57]

Done.

+      NOTREACHED();
+      return metrics::SystemProfileProto::CHANNEL_UNKNOWN;
+  }
+}
+
+}  // namespace
+
+ChromeMetricsServiceClient::ChromeMetricsServiceClient()
+    : MetricsServiceClient() {
+}
+
+ChromeMetricsServiceClient::~ChromeMetricsServiceClient() {
+}
+
+void ChromeMetricsServiceClient::SetClientID(const std::string& client_id) {
+  crash_keys::SetClientID(client_id);
+}
+
+bool ChromeMetricsServiceClient::IsOffTheRecordSessionActive() {
+  return !chrome::IsOffTheRecordSessionActive();
+}
+
+std::string ChromeMetricsServiceClient::GetApplicationLocale() {
+  return g_browser_process->GetApplicationLocale();
+}
+
+bool ChromeMetricsServiceClient::GetBrand(std::string* brand_code) {
+  return google_util::GetBrand(brand_code);
+}
+
+metrics::SystemProfileProto::Channel ChromeMetricsServiceClient::GetChannel() {
+  return AsProtobufChannel(chrome::VersionInfo::GetChannel());
+}
+
+std::string ChromeMetricsServiceClient::GetVersionString() {
+  // TODO(asvitkine): Move over from metrics_log.cc
+  return std::string();
+}