Instrumenting Predictor::StartSomeQueuedResolutions and ProfileIOData::Init to find jank.

Prior instrumentations showed:
StartSomeQueuedResolutions: 9 jph
ProfileIOData::Init: 4.4

BUG=436671

Review URL: https://codereview.chromium.org/796213002

Cr-Commit-Position: refs/heads/master@{#308097}

chrome/browser/net/predictor.cc

@@ -1166,6 +1166,11 @@ void Predictor::StartSomeQueuedResolutions() {
 
   while (!work_queue_.IsEmpty() &&
          pending_lookups_.size() < max_concurrent_dns_lookups_) {
+    // TODO(vadimt): Remove ScopedTracker below once crbug.com/436671 is fixed.
+    tracked_objects::ScopedTracker tracking_profile1(
+        FROM_HERE_WITH_EXPLICIT_FUNCTION(
+            "436671 Predictor::StartSomeQueuedResolutions1"));
+
     const GURL url(work_queue_.Pop());
     UrlInfo* info = &results_[url];
     DCHECK(info->HasUrl(url));
@@ -1177,7 +1182,19 @@ void Predictor::StartSomeQueuedResolutions() {
     }
 
     LookupRequest* request = new LookupRequest(this, host_resolver_, url);
+
+    // TODO(vadimt): Remove ScopedTracker below once crbug.com/436671 is fixed.
+    tracked_objects::ScopedTracker tracking_profile2(
+        FROM_HERE_WITH_EXPLICIT_FUNCTION(
+            "436671 Predictor::StartSomeQueuedResolutions2"));
+
     int status = request->Start();
+
+    // TODO(vadimt): Remove ScopedTracker below once crbug.com/436671 is fixed.
+    tracked_objects::ScopedTracker tracking_profile3(
+        FROM_HERE_WITH_EXPLICIT_FUNCTION(
+            "436671 Predictor::StartSomeQueuedResolutions3"));
+
     if (status == net::ERR_IO_PENDING) {
       // Will complete asynchronously.
       pending_lookups_.insert(request);

chrome/browser/profiles/profile_io_data.cc

@@ -1023,10 +1023,18 @@ void ProfileIOData::Init(
   IOThread::Globals* const io_thread_globals = io_thread->globals();
   const CommandLine& command_line = *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)
@@ -1056,6 +1064,10 @@ 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(
@@ -1074,6 +1086,10 @@ 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;
@@ -1117,6 +1133,10 @@ 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"));
+
   InitializeInternal(
       network_delegate.Pass(), profile_params_.get(),
       protocol_handlers, request_interceptors.Pass());