Remove call to GetBlockingPool in RLZ

components/rlz/rlz_tracker_delegate.h

Index: components/rlz/rlz_tracker_delegate.h
diff --git a/components/rlz/rlz_tracker_delegate.h b/components/rlz/rlz_tracker_delegate.h
index d1270e4d7957f476810f2ade9a844373846d3044..bbf43dfe1323cc58c38bd4323f8081ba1e473ee1 100644
--- a/components/rlz/rlz_tracker_delegate.h
+++ b/components/rlz/rlz_tracker_delegate.h
@@ -10,11 +10,6 @@
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
-#include "base/threading/sequenced_worker_pool.h"
-
-namespace base {
-class SequencedWorkerPool;
-}
 
 namespace net {
 class URLRequestContextGetter;
@@ -35,10 +30,6 @@ class RLZTrackerDelegate {
   // Returns whether the current thread is the UI thread.
   virtual bool IsOnUIThread() = 0;
 
-  // Returns the SequencedWorkerPool where the RLZTracker will post its tasks
-  // that should be executed in the background.
-  virtual base::SequencedWorkerPool* GetBlockingPool() = 0;
-
   // Returns the URLRequestContextGetter to use for network connections.
   virtual net::URLRequestContextGetter* GetRequestContext() = 0;