Chromecast: command-line switch to override the UMA metric upload URL.

R=byungchul@chromium.org,isherman@chromium.org
BUG=None

Review URL: https://codereview.chromium.org/506083003

Cr-Commit-Position: refs/heads/master@{#292791}

chromecast/chromecast.gyp

@@ -26,6 +26,8 @@
         'common/cast_resource_delegate.h',
         'common/chromecast_config.cc',
         'common/chromecast_config.h',
+        'common/chromecast_switches.cc',
+        'common/chromecast_switches.h',
         'common/pref_names.cc',
         'common/pref_names.h',
       ],

chromecast/common/chromecast_switches.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 "chromecast/common/chromecast_switches.h"
+
+namespace switches {
+
+// Override the URL to which metrics logs are sent for debugging.
+const char kOverrideMetricsUploadUrl[] = "override-metrics-upload-url";
+
+}  // namespace switches

chromecast/common/chromecast_switches.h

+// 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.
+
+#ifndef CHROMECAST_COMMON_CHROMECAST_SWITCHES_H_
+#define CHROMECAST_COMMON_CHROMECAST_SWITCHES_H_
+
+#include "build/build_config.h"
+
+namespace switches {
+
+// Metrics switches
+extern const char kOverrideMetricsUploadUrl[];
+
+}  // namespace switches
+
+#endif  // CHROMECAST_COMMON_CHROMECAST_SWITCHES_H_

chromecast/metrics/cast_metrics_service_client.cc

@@ -4,8 +4,10 @@
 
 #include "chromecast/metrics/cast_metrics_service_client.h"
 
+#include "base/command_line.h"
 #include "base/i18n/rtl.h"
 #include "chromecast/common/chromecast_config.h"
+#include "chromecast/common/chromecast_switches.h"
 #include "chromecast/metrics/platform_metrics_providers.h"
 #include "components/metrics/client_info.h"
 #include "components/metrics/metrics_provider.h"
@@ -81,10 +83,17 @@ CastMetricsServiceClient::CreateUploader(
     const std::string& server_url,
     const std::string& mime_type,
     const base::Callback<void(int)>& on_upload_complete) {
+  std::string uma_server_url(server_url);
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  if (command_line->HasSwitch(switches::kOverrideMetricsUploadUrl)) {
+    uma_server_url.assign(
+        command_line->GetSwitchValueASCII(switches::kOverrideMetricsUploadUrl));
+  }
+  DCHECK(!uma_server_url.empty());
   return scoped_ptr< ::metrics::MetricsLogUploader>(
       new ::metrics::NetMetricsLogUploader(
           request_context_,
-          server_url,
+          uma_server_url,
           mime_type,
           on_upload_complete));
 }