Remove dependency from content_renderer on startup_metric_utils_common.

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index c0be001511a02ae388779f4c725c961d97662e03..5602bc9b30e88b5f43eda6cac18c3267098fa9ee 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -16,6 +16,7 @@
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/time/time.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "chrome/common/channel_info.h"
@@ -74,6 +75,7 @@
 #include "components/pdf/renderer/pepper_pdf_host.h"
 #include "components/plugins/renderer/mobile_youtube_plugin.h"
 #include "components/signin/core/common/profile_management_switches.h"
+#include "components/startup_metric_utils/common/startup_metric_messages.h"
 #include "components/version_info/version_info.h"
 #include "components/visitedlink/renderer/visitedlink_slave.h"
 #include "components/web_cache/renderer/web_cache_render_process_observer.h"
@@ -319,9 +321,20 @@ ChromeContentRendererClient::ChromeContentRendererClient() {
 ChromeContentRendererClient::~ChromeContentRendererClient() {
 }
 
+void ChromeContentRendererClient::RendererMainEntered() {
+  // Record the main entry time. It will be sent to the browser process via an
+  // IPC once the RenderThread has been created.
+  DCHECK(renderer_main_entry_time_.is_null());
+  renderer_main_entry_time_ = base::TimeTicks::Now();

[jam, 2016/02/01 23:28:02]

why not just do this in the constructor to avoid a new method?

[fdoray, 2016/02/02 01:32:49]

Done.

+}
+
 void ChromeContentRendererClient::RenderThreadStarted() {
   RenderThread* thread = RenderThread::Get();
 
+  DCHECK(!renderer_main_entry_time_.is_null());
+  thread->Send(new StartupMetricHostMsg_RecordRendererMainEntryTime(
+      renderer_main_entry_time_));
+
   chrome_observer_.reset(new ChromeRenderProcessObserver());
   web_cache_observer_.reset(new web_cache::WebCacheRenderProcessObserver());