Improve reporting of subprocess crashes....

chrome/common/child_process_host.cc

 // Copyright (c) 2009 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/common/child_process_host.h"
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
+#include "base/histogram.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
 #include "base/singleton.h"
 #include "base/string_util.h"
 #include "base/waitable_event.h"
 #include "chrome/browser/chrome_thread.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths_internal.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 156 matching lines @@
       ChromeThread::UI, FROM_HERE, new ChildNotificationTask(type, this));
 }
 
 void ChildProcessHost::OnChildDied() {
   if (child_process_->GetHandle()) {
     bool did_crash = child_process_->DidProcessCrash();
     if (did_crash) {
       OnProcessCrashed();
       // Report that this child process crashed.
       Notify(NotificationType::CHILD_PROCESS_CRASHED);
+      UMA_HISTOGRAM_COUNTS("ChildProcess.Crashes", this->type());
     }
     // Notify in the main loop of the disconnection.
     Notify(NotificationType::CHILD_PROCESS_HOST_DISCONNECTED);
   }
 
   delete this;
 }
 
 ChildProcessHost::ListenerHook::ListenerHook(ChildProcessHost* host)
     : host_(host) {
@@ skipping 98 matching lines @@
 
     return *iterator_;
   } while (true);
 
   return NULL;
 }
 
 bool ChildProcessHost::Iterator::Done() {
   return iterator_ == Singleton<ChildProcessList>::get()->end();
 }