Remove old flags from about:flags and add new ones instead.

chrome/browser/nacl_host/nacl_process_host.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 "chrome/browser/nacl_host/nacl_process_host.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop.h"
+#include "base/metrics/histogram.h"
 #include "base/path_service.h"
 #include "base/string_number_conversions.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "base/win/windows_version.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/extension_info_map.h"
@@ skipping 184 matching lines @@
 }
 
 // This is called at browser startup.
 // static
 void NaClProcessHost::EarlyStartup() {
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
   // Open the IRT file early to make sure that it isn't replaced out from
   // under us by autoupdate.
   NaClBrowser::GetInstance()->EnsureIrtAvailable();
 #endif
+  CommandLine* cmd = CommandLine::ForCurrentProcess();
+  UMA_HISTOGRAM_BOOLEAN(
+      "NaCl.nacl-gdb",
+      !cmd->GetSwitchValuePath(switches::kNaClGdb).empty());
+  UMA_HISTOGRAM_BOOLEAN(
+      "NaCl.nacl-gdb-script",
+      !cmd->GetSwitchValuePath(switches::kNaClGdbScript).empty());
+  UMA_HISTOGRAM_BOOLEAN(
+      "NaCl.enable-nacl-debug",
+      cmd->HasSwitch(switches::kEnableNaClDebug));
 }
 
 void NaClProcessHost::Launch(
     ChromeRenderMessageFilter* chrome_render_message_filter,
     int socket_count,
     IPC::Message* reply_msg,
     scoped_refptr<ExtensionInfoMap> extension_info_map) {
   chrome_render_message_filter_ = chrome_render_message_filter;
   reply_msg_ = reply_msg;
   extension_info_map_ = extension_info_map;
@@ skipping 616 matching lines @@
   } else {
     NaClStartDebugExceptionHandlerThread(
         process_handle.Take(), info,
         base::MessageLoopProxy::current(),
         base::Bind(&NaClProcessHost::OnDebugExceptionHandlerLaunchedByBroker,
                    weak_factory_.GetWeakPtr()));
     return true;
   }
 }
 #endif