Remove unnecessary instrumentation for several jank bugs.

components/nacl/browser/pnacl_translation_cache.cc

Index: components/nacl/browser/pnacl_translation_cache.cc
diff --git a/components/nacl/browser/pnacl_translation_cache.cc b/components/nacl/browser/pnacl_translation_cache.cc
index 5ab1d38fa03d4f07063c95be3ae3927ea6f89678..1ccce9c0dff9ea3b44bb1ce00ed6d11ab620825f 100644
--- a/components/nacl/browser/pnacl_translation_cache.cc
+++ b/components/nacl/browser/pnacl_translation_cache.cc
@@ -9,7 +9,6 @@
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
-#include "base/profiler/scoped_tracker.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/threading/thread_checker.h"
 #include "components/nacl/common/pnacl_types.h"
@@ -241,11 +240,6 @@ void PnaclTranslationCacheEntry::Finish(int rv) {
 }
 
 void PnaclTranslationCacheEntry::DispatchNext(int rv) {
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
-  tracked_objects::ScopedTracker tracking_profile(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "422516 PnaclTranslationCacheEntry::DispatchNext"));
-
   DCHECK(thread_checker_.CalledOnValidThread());
   if (!cache_)
     return;