Remove unnecessary instrumentation for several jank bugs.

content/browser/loader/power_save_block_resource_throttle.cc

Index: content/browser/loader/power_save_block_resource_throttle.cc
diff --git a/content/browser/loader/power_save_block_resource_throttle.cc b/content/browser/loader/power_save_block_resource_throttle.cc
index 23f200286c3fb99c5100dcdc4baaf63b011d6221..42e0b0e46d87603906bff6a31d558da87fc4278a 100644
--- a/content/browser/loader/power_save_block_resource_throttle.cc
+++ b/content/browser/loader/power_save_block_resource_throttle.cc
@@ -4,7 +4,6 @@
 
 #include "content/browser/loader/power_save_block_resource_throttle.h"
 
-#include "base/profiler/scoped_tracker.h"
 #include "content/public/browser/power_save_blocker.h"
 
 namespace content {
@@ -30,11 +29,6 @@ void PowerSaveBlockResourceThrottle::WillStartRequest(bool* defer) {
 }
 
 void PowerSaveBlockResourceThrottle::WillProcessResponse(bool* defer) {
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
-  tracked_objects::ScopedTracker tracking_profile(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "422516 PowerSaveBlockResourceThrottle::WillProcessResponse"));
-
   // Stop blocking power save after request finishes.
   power_save_blocker_.reset();
   timer_.Stop();