Add UMA for profile creation during startup.

chrome/browser/chrome_browser_main.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_browser_main.h"
 
 #if defined(TOOLKIT_GTK)
 #include <gtk/gtk.h>
 #endif
 
@@ skipping 311 matching lines @@
       user_data_dir);
 }
 
 // Initializes the profile, possibly doing some user prompting to pick a
 // fallback profile. Returns the newly created profile, or NULL if startup
 // should not continue.
 Profile* CreateProfile(const content::MainFunctionParams& parameters,
                        const base::FilePath& user_data_dir,
                        const CommandLine& parsed_command_line) {
   TRACE_EVENT0("startup", "ChromeBrowserMainParts::CreateProfile")
+  base::Time start = base::Time::Now();
   if (profiles::IsMultipleProfilesEnabled() &&
       parsed_command_line.HasSwitch(switches::kProfileDirectory)) {
     g_browser_process->local_state()->SetString(prefs::kProfileLastUsed,
         parsed_command_line.GetSwitchValueASCII(switches::kProfileDirectory));
     // Clear kProfilesLastActive since the user only wants to launch a specific
     // profile.
     ListPrefUpdate update(g_browser_process->local_state(),
                           prefs::kProfilesLastActive);
     ListValue* profile_list = update.Get();
     profile_list->Clear();
   }
 
   Profile* profile = NULL;
 #if defined(OS_CHROMEOS)
   // TODO(ivankr): http://crbug.com/83792
   profile = g_browser_process->profile_manager()->GetDefaultProfile(
       user_data_dir);
 #else
   base::FilePath profile_path =
       GetStartupProfilePath(user_data_dir, parsed_command_line);
   profile = g_browser_process->profile_manager()->GetProfile(
       profile_path);
 #endif
-  if (profile)
+  if (profile) {
+    UMA_HISTOGRAM_LONG_TIMES(
+        "Startup.CreateFirstProfile", base::Time::Now() - start);
     return profile;
+  }
 
 #if !defined(OS_WIN)
   // TODO(port): fix this.  See comments near the definition of
   // user_data_dir.  It is better to CHECK-fail here than it is to
   // silently exit because of missing code in the above test.
   CHECK(profile) << "Cannot get default profile.";
 #endif
 
   return NULL;
 }
@@ skipping 1326 matching lines @@
   chromeos::CrosSettings::Shutdown();
 #endif
 #endif
 }
 
 // Public members:
 
 void ChromeBrowserMainParts::AddParts(ChromeBrowserMainExtraParts* parts) {
   chrome_extra_parts_.push_back(parts);
 }