Add some tracing for Profiles and Extensions.

chrome/browser/extensions/extension_system_impl.cc

 // Copyright 2014 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/extensions/extension_system_impl.h"
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/memory/weak_ptr.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_tokenizer.h"
 #include "base/strings/string_util.h"
+#include "base/trace_event/trace_event.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/content_settings/cookie_settings.h"
 #include "chrome/browser/extensions/component_loader.h"
 #include "chrome/browser/extensions/declarative_user_script_manager.h"
 #include "chrome/browser/extensions/error_console/error_console.h"
 #include "chrome/browser/extensions/extension_error_reporter.h"
 #include "chrome/browser/extensions/extension_management.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system_factory.h"
 #include "chrome/browser/extensions/extension_util.h"
@@ skipping 261 matching lines @@
   // For reporting metrics in BOOTSTRAP mode, when an extension would be
   // disabled if content verification was in ENFORCE mode.
   std::set<std::string> would_be_disabled_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentVerifierDelegateImpl);
 };
 
 }  // namespace
 
 void ExtensionSystemImpl::Shared::Init(bool extensions_enabled) {
+  TRACE_EVENT0("browser,startup", "ExtensionSystemImpl::Shared::Init");
   const base::CommandLine* command_line =
       base::CommandLine::ForCurrentProcess();
 
   navigation_observer_.reset(new NavigationObserver(profile_));
 
   bool allow_noisy_errors = !command_line->HasSwitch(switches::kNoErrorDialogs);
   ExtensionErrorReporter::Init(allow_noisy_errors);
 
   shared_user_script_master_.reset(new SharedUserScriptMaster(profile_));
   declarative_user_script_manager_.reset(
@@ skipping 172 matching lines @@
   }
 }
 
 ExtensionSystemImpl::~ExtensionSystemImpl() {
 }
 
 void ExtensionSystemImpl::Shutdown() {
 }
 
 void ExtensionSystemImpl::InitForRegularProfile(bool extensions_enabled) {
+  TRACE_EVENT0("browser,startup", "ExtensionSystemImpl::InitForRegularProfile");
   DCHECK(!profile_->IsOffTheRecord());
   if (shared_user_script_master() || extension_service())
     return;  // Already initialized.
 
   // The InfoMap needs to be created before the ProcessManager.
   shared_->info_map();
   shared_->Init(extensions_enabled);
 }
 
 ExtensionService* ExtensionSystemImpl::extension_service() {
@@ skipping 92 matching lines @@
 void ExtensionSystemImpl::UnregisterExtensionWithRequestContexts(
     const std::string& extension_id,
     const UnloadedExtensionInfo::Reason reason) {
   BrowserThread::PostTask(
       BrowserThread::IO,
       FROM_HERE,
       base::Bind(&InfoMap::RemoveExtension, info_map(), extension_id, reason));
 }
 
 }  // namespace extensions