Add renderer launch count to stability metrics.

chrome/browser/metrics/chrome_stability_metrics_provider.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_stability_metrics_provider.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
@@ skipping 30 matching lines @@
 void ChromeStabilityMetricsProvider::OnRecordingEnabled() {
   registrar_.Add(this,
                  content::NOTIFICATION_LOAD_START,
                  content::NotificationService::AllSources());
   registrar_.Add(this,
                  content::NOTIFICATION_RENDERER_PROCESS_CLOSED,
                  content::NotificationService::AllSources());
   registrar_.Add(this,
                  content::NOTIFICATION_RENDER_WIDGET_HOST_HANG,
                  content::NotificationService::AllSources());
+  registrar_.Add(this,
+                 content::NOTIFICATION_RENDERER_PROCESS_CREATED,
+                 content::NotificationService::AllSources());
 }
 
 void ChromeStabilityMetricsProvider::OnRecordingDisabled() {
   registrar_.RemoveAll();
 }
 
 void ChromeStabilityMetricsProvider::ProvideStabilityMetrics(
     metrics::SystemProfileProto* system_profile_proto) {
   helper_.ProvideStabilityMetrics(system_profile_proto);
 }
@@ skipping 27 matching lines @@
 #endif
       helper_.LogRendererCrash(was_extension_process, process_details->status,
                                process_details->exit_code);
       break;
     }
 
     case content::NOTIFICATION_RENDER_WIDGET_HOST_HANG:
       helper_.LogRendererHang();
       break;
 
+    case content::NOTIFICATION_RENDERER_PROCESS_CREATED: {
+      bool was_extension_process = false;
+#if defined(ENABLE_EXTENSIONS)
+      content::RenderProcessHost* host =
+          content::Source<content::RenderProcessHost>(source).ptr();
+      if (extensions::ProcessMap::Get(host->GetBrowserContext())
+              ->Contains(host->GetID())) {
+        was_extension_process = true;
+      }
+#endif
+      helper_.LogRendererLaunched(was_extension_process);
+      break;
+    }
+
     default:
       NOTREACHED();
       break;
   }
 }
 
 void ChromeStabilityMetricsProvider::BrowserChildProcessCrashed(
     const content::ChildProcessData& data,
     int exit_code) {
 #if defined(ENABLE_PLUGINS)
   // Exclude plugin crashes from the count below because we report them via
   // a separate UMA metric.
   if (PluginMetricsProvider::IsPluginProcess(data.process_type))
     return;
 #endif
 
   helper_.BrowserChildProcessCrashed();
 }