Add a boolean histogram "Chrome.CommandLineUseSystemSSL" to keep track of

content/browser/browser_main_loop.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 "content/browser/browser_main_loop.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 245 matching lines @@
   // Use NSS for SSL by default.
   // The default client socket factory uses NSS for SSL by default on
   // Windows and Mac.
   bool init_nspr = false;
 #if defined(OS_WIN) || defined(OS_MACOSX)
   if (parsed_command_line_.HasSwitch(switches::kUseSystemSSL)) {
     net::ClientSocketFactory::UseSystemSSL();
   } else {
     init_nspr = true;
   }
+  UMA_HISTOGRAM_BOOLEAN("Chrome.CommandLineUseSystemSSL", !init_nspr);
 #elif defined(USE_NSS)
   init_nspr = true;
 #endif
   if (init_nspr) {
     // We want to be sure to init NSPR on the main thread.
     crypto::EnsureNSPRInit();
   }
 #endif  // !defined(USE_OPENSSL)
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
@@ skipping 358 matching lines @@
     MessageLoopForUI::current()->PostTask(FROM_HERE, *parameters_.ui_task);
 
 #if defined(OS_MACOSX)
   MessageLoopForUI::current()->Run();
 #else
   MessageLoopForUI::current()->RunWithDispatcher(NULL);
 #endif
 }
 
 }  // namespace content