Remove unnecessary instrumentation for several jank bugs.

chrome/browser/profiles/profile_io_data.cc

Index: chrome/browser/profiles/profile_io_data.cc
diff --git a/chrome/browser/profiles/profile_io_data.cc b/chrome/browser/profiles/profile_io_data.cc
index 8457344dfe9036313e06de4c6e95ecebdc19a02c..88ea1699910113ac21128afd5cf48e0e2c33a132 100644
--- a/chrome/browser/profiles/profile_io_data.cc
+++ b/chrome/browser/profiles/profile_io_data.cc
@@ -16,7 +16,6 @@
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_service.h"
-#include "base/profiler/scoped_tracker.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
@@ -983,10 +982,6 @@ std::string ProfileIOData::GetSSLSessionCacheShard() {
 void ProfileIOData::Init(
     content::ProtocolHandlerMap* protocol_handlers,
     content::URLRequestInterceptorScopedVector request_interceptors) const {
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/436671 is fixed.
-  tracked_objects::ScopedTracker tracking_profile(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION("436671 ProfileIOData::Init"));
-
   // The basic logic is implemented here. The specific initialization
   // is done in InitializeInternal(), implemented by subtypes. Static helper
   // functions have been provided to assist in common operations.
@@ -1007,18 +1002,10 @@ void ProfileIOData::Init(
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
 
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/436671 is fixed.
-  tracked_objects::ScopedTracker tracking_profile1(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION("436671 ProfileIOData::Init1"));
-
   // Create the common request contexts.
   main_request_context_.reset(new net::URLRequestContext());
   extensions_request_context_.reset(new net::URLRequestContext());
 
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/436671 is fixed.
-  tracked_objects::ScopedTracker tracking_profile2(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION("436671 ProfileIOData::Init2"));
-
   scoped_ptr<ChromeNetworkDelegate> network_delegate(
       new ChromeNetworkDelegate(
 #if defined(ENABLE_EXTENSIONS)
@@ -1045,10 +1032,6 @@ void ProfileIOData::Init(
       new chrome_browser_net::ChromeFraudulentCertificateReporter(
           main_request_context_.get()));
 
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/436671 is fixed.
-  tracked_objects::ScopedTracker tracking_profile3(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION("436671 ProfileIOData::Init3"));
-
   // NOTE: Proxy service uses the default io thread network delegate, not the
   // delegate just created.
   proxy_service_.reset(
@@ -1067,10 +1050,6 @@ void ProfileIOData::Init(
           BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE),
           IsOffTheRecord()));
 
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/436671 is fixed.
-  tracked_objects::ScopedTracker tracking_profile4(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION("436671 ProfileIOData::Init4"));
-
   // Take ownership over these parameters.
   cookie_settings_ = profile_params_->cookie_settings;
   host_content_settings_map_ = profile_params_->host_content_settings_map;
@@ -1114,10 +1093,6 @@ void ProfileIOData::Init(
       io_thread_globals->cert_verifier.get());
 #endif
 
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/436671 is fixed.
-  tracked_objects::ScopedTracker tracking_profile5(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION("436671 ProfileIOData::Init5"));
-
   // Install the New Tab Page Interceptor.
   if (profile_params_->new_tab_page_interceptor.get()) {
     request_interceptors.push_back(