Profiler-instrumentation of the startup time.

content/app/content_main_runner.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/public/app/content_main_runner.h"
 
 #include <stdlib.h>
 
 #include "base/allocator/allocator_extension.h"
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/files/file_path.h"
 #include "base/i18n/icu_util.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/path_service.h"
 #include "base/process/launch.h"
 #include "base/process/memory.h"
 #include "base/process/process_handle.h"
 #include "base/profiler/alternate_timer.h"
+#include "base/profiler/scoped_tracker.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/trace_event.h"
 #include "content/browser/browser_main.h"
 #include "content/common/set_process_title.h"
 #include "content/common/url_schemes.h"
 #include "content/gpu/in_process_gpu_thread.h"
 #include "content/public/app/content_main.h"
 #include "content/public/app/content_main_delegate.h"
@@ skipping 527 matching lines @@
 
 #if !defined(OS_WIN)
     argc = params.argc;
     argv = params.argv;
 #endif
 
     base::CommandLine::Init(argc, argv);
 
     base::EnableTerminationOnHeapCorruption();
 
+    // TODO(yiyaoliu, vadimt): Remove this once crbug.com/453640 is fixed.
+    // Enable profiler recording right after command line is initialized so that
+    // browser startup can be instrumented.
+    if (delegate_ && delegate_->ShouldEnableProfilerRecording())
+      tracked_objects::ScopedTracker::Enable();
+
 #if !defined(OS_IOS)
     SetProcessTitleFromCommandLine(argv);
 #endif
 #endif // !OS_ANDROID
 
     int exit_code = 0;
     if (delegate_ && delegate_->BasicStartupComplete(&exit_code))
       return exit_code;
 
     completed_basic_startup_ = true;
@@ skipping 245 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(ContentMainRunnerImpl);
 };
 
 // static
 ContentMainRunner* ContentMainRunner::Create() {
   return new ContentMainRunnerImpl();
 }
 
 }  // namespace content