Add UMA actions for launching the plugin loader utility process.

content/browser/plugin_loader_posix.cc

Index: content/browser/plugin_loader_posix.cc
diff --git a/content/browser/plugin_loader_posix.cc b/content/browser/plugin_loader_posix.cc
index e6bc3ea27f5ace0c82b6527dc5541376e8c19bac..ac9e4067083ee5a4bc701629f651fbfa92550234 100644
--- a/content/browser/plugin_loader_posix.cc
+++ b/content/browser/plugin_loader_posix.cc
@@ -8,6 +8,7 @@
 #include "base/message_loop/message_loop.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/metrics/histogram.h"
+#include "base/metrics/user_metrics.h"
 #include "content/browser/utility_process_host_impl.h"
 #include "content/common/child_process_host_impl.h"
 #include "content/common/plugin_list.h"
@@ -15,6 +16,9 @@
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/plugin_service.h"
 
+using base::RecordAction;
+using base::UserMetricsAction;

[jochen (gone - plz use gerrit), 2014/01/16 15:32:50]

i don't think it's necessary to use "using"... usually we just do this to help
during refactoring or for blink classes.

+
 namespace content {
 
 PluginLoaderPosix::PluginLoaderPosix()
@@ -45,6 +49,8 @@ bool PluginLoaderPosix::OnMessageReceived(const IPC::Message& message) {
 }
 
 void PluginLoaderPosix::OnProcessCrashed(int exit_code) {
+  RecordAction(UserMetricsAction("PluginLoaderPosix.UtilityProcessCrashed"));
+
   if (next_load_index_ == canonical_list_.size()) {
     // How this case occurs is unknown. See crbug.com/111935.
     canonical_list_.clear();
@@ -100,6 +106,8 @@ void PluginLoaderPosix::LoadPluginsInternal() {
   if (MaybeRunPendingCallbacks())
     return;
 
+  RecordAction(UserMetricsAction("PluginLoaderPosix.LaunchUtilityProcess"));
+
   if (load_start_time_.is_null())
     load_start_time_ = base::TimeTicks::Now();