Implement a poor man's PostAfterStartupTask() function.

content/browser/browser_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/browser/browser_main_runner.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/debug/leak_annotations.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/statistics_recorder.h"
+#include "base/time/time.h"
 #include "base/trace_event/trace_event.h"
 #include "content/browser/browser_main_loop.h"
 #include "content/browser/browser_shutdown_profile_dumper.h"
 #include "content/browser/notification_service_impl.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
 #include "ui/base/ime/input_method_initializer.h"
 
 #if defined(OS_WIN)
 #include "base/win/win_util.h"
@@ skipping 81 matching lines @@
   }
 
   DWORD dummy = 0;
   CHECK(::VirtualProtect(cert_verify_signature_ptr, 5, old_protect, &dummy));
   CHECK(::VirtualProtect(g_real_crypt_verify_signature_stub,
                          sidestep::kMaxPreambleStubSize, old_protect,
                          &old_protect));
 #endif  // _WIN64
 }
 
+base::TimeTicks g_process_startup_ticks;
+
 }  // namespace
 
 #endif  // OS_WIN
 
 class BrowserMainRunnerImpl : public BrowserMainRunner {
  public:
   BrowserMainRunnerImpl()
       : initialization_started_(false), is_shutdown_(false) {}
 
   ~BrowserMainRunnerImpl() override {
     if (initialization_started_ && !is_shutdown_)
       Shutdown();
   }
 
   int Initialize(const MainFunctionParams& parameters) override {
     TRACE_EVENT0("startup", "BrowserMainRunnerImpl::Initialize");
     // On Android we normally initialize the browser in a series of UI thread
     // tasks. While this is happening a second request can come from the OS or
     // another application to start the browser. If this happens then we must
     // not run these parts of initialization twice.
     if (!initialization_started_) {
       initialization_started_ = true;
 
+    g_process_startup_ticks = base::TimeTicks::Now();
+
 #if !defined(OS_IOS)
       if (parameters.command_line.HasSwitch(switches::kWaitForDebugger))
         base::debug::WaitForDebugger(60, true);
 #endif
 
 #if defined(OS_WIN)
       if (base::win::GetVersion() < base::win::VERSION_VISTA) {
         // When "Extend support of advanced text services to all programs"
         // (a.k.a. Cicero Unaware Application Support; CUAS) is enabled on
         // Windows XP and handwriting modules shipped with Office 2003 are
@@ skipping 129 matching lines @@
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(BrowserMainRunnerImpl);
 };
 
 // static
 BrowserMainRunner* BrowserMainRunner::Create() {
   return new BrowserMainRunnerImpl();
 }
 
+// TODO(michaeln): Where should this go and what signal should be used?
+bool IsBrowserStartingUp() {

[michaeln, 2015/02/24 23:07:11]

The startup metrics component tracks some stats like this, but it's
interpretation of 'starting up' is just how long till the main msg loop begins
pumping msgs.

+  return base::TimeTicks::Now() - g_process_startup_ticks <
+         base::TimeDelta::FromSeconds(15);
+}
+
 }  // namespace content