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

chrome/browser/chrome_content_browser_client.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/chrome_content_browser_client.h"
 
 #include <set>
 #include <utility>
 #include <vector>
 
@@ skipping 1220 matching lines @@
     return false;
   }
   return true;
 }
 
 }  // namespace
 
 void ChromeContentBrowserClient::AppendExtraCommandLineSwitches(
     base::CommandLine* command_line,
     int child_process_id) {
-#if defined(OS_POSIX) && !defined(OS_MACOSX)
+#if defined(OS_MACOSX)
+  scoped_ptr<metrics::ClientInfo> client_info =
+      GoogleUpdateSettings::LoadMetricsClientInfo();
+  if (client_info) {
+    command_line->AppendSwitchASCII(switches::kMetricsClientID,
+                                    client_info->client_id);
+  }
+#elif defined(OS_POSIX)
   if (breakpad::IsCrashReporterEnabled()) {
     scoped_ptr<metrics::ClientInfo> client_info =
         GoogleUpdateSettings::LoadMetricsClientInfo();
     command_line->AppendSwitchASCII(switches::kEnableCrashReporter,
                                     client_info ? client_info->client_id
                                                 : std::string());
   }
-#endif  // defined(OS_POSIX) && !defined(OS_MACOSX)
+#endif
 
   if (logging::DialogsAreSuppressed())
     command_line->AppendSwitch(switches::kNoErrorDialogs);
 
   std::string process_type =
       command_line->GetSwitchValueASCII(switches::kProcessType);
   const base::CommandLine& browser_command_line =
       *base::CommandLine::ForCurrentProcess();
 
   static const char* const kCommonSwitchNames[] = {
@@ skipping 1313 matching lines @@
       switches::kDisableWebRtcEncryption,
     };
     to_command_line->CopySwitchesFrom(from_command_line,
                                       kWebRtcDevSwitchNames,
                                       arraysize(kWebRtcDevSwitchNames));
   }
 }
 #endif  // defined(ENABLE_WEBRTC)
 
 }  // namespace chrome