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

chrome/common/chrome_switches.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/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 
 namespace switches {
@@ skipping 1252 matching lines @@
 
 // Forcibly disables Lion-style on newer OSes, to allow developers to test the
 // older, SnowLeopard-style fullscreen.
 const char kDisableSystemFullscreenForTesting[] =
     "disable-system-fullscreen-for-testing";
 
 // A process type (switches::kProcessType) that relaunches the browser. See
 // chrome/browser/mac/relauncher.h.
 const char kRelauncherProcess[]             = "relauncher";
 
+// This is how the metrics client ID is passed from the browser process to its
+// children. With Crashpad, the metrics client ID is distinct from the crash
+// client ID.
+const char kMetricsClientID[]               = "metrics-client-id";
+
 #endif
 
 // Use bubbles for content permissions requests instead of infobars.
 const char kEnablePermissionsBubbles[]      = "enable-permissions-bubbles";
 
 #if defined(OS_WIN)
 // Fallback to XPS. By default connector uses CDD.
 const char kEnableCloudPrintXps[]           = "enable-cloud-print-xps";
 
 // Force-enables the profile shortcut manager. This is needed for tests since
@@ skipping 99 matching lines @@
 
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR CRAP TO THE BOTTOM OF THIS FILE.
 //
 // You were going to just dump your switches here, weren't you? Instead, please
 // put them in alphabetical order above, or in order inside the appropriate
 // ifdef at the bottom. The order should match the header.
 // -----------------------------------------------------------------------------
 
 }  // namespace switches