Add UMA metric: Startup.BrowserMainToRendererMain.

chrome/browser/chrome_content_browser_client.cc

 // Copyright (c) 2012 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/chrome_content_browser_client.h"
 
 #include <map>
 #include <set>
 #include <utility>
 #include <vector>
@@ skipping 99 matching lines @@
 #include "components/content_settings/core/common/content_settings.h"
 #include "components/data_reduction_proxy/content/browser/data_reduction_proxy_message_filter.h"
 #include "components/dom_distiller/core/dom_distiller_switches.h"
 #include "components/dom_distiller/core/url_constants.h"
 #include "components/google/core/browser/google_util.h"
 #include "components/metrics/client_info.h"
 #include "components/net_log/chrome_net_log.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "components/rappor/rappor_utils.h"
 #include "components/signin/core/common/profile_management_switches.h"
+#include "components/startup_metric_utils/browser/startup_metric_message_filter.h"
 #include "components/translate/core/common/translate_switches.h"
 #include "components/url_formatter/url_fixer.h"
 #include "components/variations/variations_associated_data.h"
 #include "components/version_info/version_info.h"
 #include "content/public/browser/browser_child_process_host.h"
 #include "content/public/browser/browser_main_parts.h"
 #include "content/public/browser/browser_ppapi_host.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/browser_url_handler.h"
 #include "content/public/browser/child_process_data.h"
@@ skipping 770 matching lines @@
       profile->GetPath(),
       context));
 #endif
 #if defined(OS_ANDROID)
   host->AddFilter(new cdm::CdmMessageFilterAndroid());
 #endif
   DataReductionProxyChromeSettings* data_reduction_proxy_settings =
       DataReductionProxyChromeSettingsFactory::GetForBrowserContext(profile);
   host->AddFilter(new data_reduction_proxy::DataReductionProxyMessageFilter(
       data_reduction_proxy_settings));
+  host->AddFilter(new startup_metric_utils::StartupMetricMessageFilter());
 
   host->Send(new ChromeViewMsg_SetIsIncognitoProcess(
       profile->IsOffTheRecord()));
 
   for (size_t i = 0; i < extra_parts_.size(); ++i)
     extra_parts_[i]->RenderProcessWillLaunch(host);
 
   RendererContentSettingRules rules;
   if (host->IsForGuestsOnly()) {
 #if defined(ENABLE_EXTENSIONS)
@@ skipping 1847 matching lines @@
   if (channel <= kMaxDisableEncryptionChannel) {
     static const char* const kWebRtcDevSwitchNames[] = {
       switches::kDisableWebRtcEncryption,
     };
     to_command_line->CopySwitchesFrom(from_command_line,
                                       kWebRtcDevSwitchNames,
                                       arraysize(kWebRtcDevSwitchNames));
   }
 }
 #endif  // defined(ENABLE_WEBRTC)