Instrument BrowserGpuChannelHostFactory::EstablishRequest::FinishOnMain Codepaths to Find Jank

content/browser/gpu/browser_gpu_channel_host_factory.cc

Index: content/browser/gpu/browser_gpu_channel_host_factory.cc
diff --git a/content/browser/gpu/browser_gpu_channel_host_factory.cc b/content/browser/gpu/browser_gpu_channel_host_factory.cc
index fea661a4084ac07a158f20fe162574be2613ce8c..d938b4ba918b5842724a382ad62b3573ca42c26b 100644
--- a/content/browser/gpu/browser_gpu_channel_host_factory.cc
+++ b/content/browser/gpu/browser_gpu_channel_host_factory.cc
@@ -420,6 +420,11 @@ void BrowserGpuChannelHostFactory::GpuChannelEstablished() {
   if (pending_request_->channel_handle().name.empty()) {
     DCHECK(!gpu_channel_.get());
   } else {
+    // TODO(robliao): Remove ScopedTracker below once https://crbug.com/466866
+    // is fixed.
+    tracked_objects::ScopedTracker tracking_profile1(
+        FROM_HERE_WITH_EXPLICIT_FUNCTION(
+            "466866 BrowserGpuChannelHostFactory::GpuChannelEstablished1"));
     GetContentClient()->SetGpuInfo(pending_request_->gpu_info());
     gpu_channel_ =
         GpuChannelHost::Create(this,
@@ -431,6 +436,12 @@ void BrowserGpuChannelHostFactory::GpuChannelEstablished() {
   gpu_host_id_ = pending_request_->gpu_host_id();
   pending_request_ = NULL;
 
+  // TODO(robliao): Remove ScopedTracker below once https://crbug.com/466866 is
+  // fixed.
+  tracked_objects::ScopedTracker tracking_profile2(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "466866 BrowserGpuChannelHostFactory::GpuChannelEstablished2"));
+
   for (size_t n = 0; n < established_callbacks_.size(); n++)
     established_callbacks_[n].Run();