Add UMA actions for launching the plugin loader utility process.

content/browser/plugin_loader_posix.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 "content/browser/plugin_loader_posix.h"
 
 #include "base/bind.h"
 #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"
 #include "content/common/utility_messages.h"
 #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()
     : next_load_index_(0) {
 }
 
 void PluginLoaderPosix::LoadPlugins(
     scoped_refptr<base::MessageLoopProxy> target_loop,
     const PluginService::GetPluginsCallback& callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
@@ skipping 10 matching lines @@
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PluginLoaderPosix, message)
     IPC_MESSAGE_HANDLER(UtilityHostMsg_LoadedPlugin, OnPluginLoaded)
     IPC_MESSAGE_HANDLER(UtilityHostMsg_LoadPluginFailed, OnPluginLoadFailed)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 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();
   } else {
     canonical_list_.erase(canonical_list_.begin(),
                           canonical_list_.begin() + next_load_index_ + 1);
   }
 
   next_load_index_ = 0;
 
@@ skipping 35 matching lines @@
 }
 
 void PluginLoaderPosix::LoadPluginsInternal() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   // Check if the list is empty or all plugins have already been loaded before
   // forking.
   if (MaybeRunPendingCallbacks())
     return;
 
+  RecordAction(UserMetricsAction("PluginLoaderPosix.LaunchUtilityProcess"));
+
   if (load_start_time_.is_null())
     load_start_time_ = base::TimeTicks::Now();
 
   UtilityProcessHostImpl* host = new UtilityProcessHostImpl(
       this,
       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO).get());
   process_host_ = host->AsWeakPtr();
   process_host_->DisableSandbox();
 #if defined(OS_MACOSX)
   host->set_child_flags(ChildProcessHost::CHILD_ALLOW_HEAP_EXECUTION);
@@ skipping 79 matching lines @@
     scoped_refptr<base::MessageLoopProxy> loop,
     const PluginService::GetPluginsCallback& cb)
     : target_loop(loop),
       callback(cb) {
 }
 
 PluginLoaderPosix::PendingCallback::~PendingCallback() {
 }
 
 }  // namespace content