Set a "metrics_client_id" crash key instead of "guid" on Mac OS X

chrome/app/chrome_main_delegate.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/app/chrome_main_delegate.h"
 
 #include "base/base_paths.h"
 #include "base/command_line.h"
 #include "base/cpu.h"
 #include "base/files/file_path.h"
@@ skipping 551 matching lines @@
 #if defined(OS_MACOSX)
 void ChromeMainDelegate::InitMacCrashReporter(
     const base::CommandLine& command_line,
     const std::string& process_type) {
   // TODO(mark): Right now, InitializeCrashpad() needs to be called after
   // CommandLine::Init() and chrome::RegisterPathProvider().  Ideally, Crashpad
   // initialization could occur sooner, preferably even before the framework
   // dylib is even loaded, to catch potential early crashes.
   crash_reporter::InitializeCrashpad(process_type);
 
+  const bool browser_process = process_type.empty();
+  if (!browser_process) {
+    std::string metrics_client_id =
+        command_line.GetSwitchValueASCII(switches::kMetricsClientID);
+    crash_keys::SetMetricsClientIdFromGUID(metrics_client_id);
+  }
+
   // Mac Chrome is packaged with a main app bundle and a helper app bundle.
   // The main app bundle should only be used for the browser process, so it
   // should never see a --type switch (switches::kProcessType).  Likewise,
   // the helper should always have a --type switch.
   //
   // This check is done this late so there is already a call to
   // base::mac::IsBackgroundOnlyProcess(), so there is no change in
   // startup/initialization order.
 
   // The helper's Info.plist marks it as a background only app.
@@ skipping 371 matching lines @@
     case chrome::VersionInfo::CHANNEL_CANARY:
       return true;
     case chrome::VersionInfo::CHANNEL_DEV:
     case chrome::VersionInfo::CHANNEL_BETA:
     case chrome::VersionInfo::CHANNEL_STABLE:
     default:
       // Don't enable instrumentation.
       return false;
   }
 }