Remove WriteBlockedList::use_stream_to_priority.

net/quic/quic_write_blocked_list.h

Index: net/quic/quic_write_blocked_list.h
diff --git a/net/quic/quic_write_blocked_list.h b/net/quic/quic_write_blocked_list.h
index cb6a89a3ce3ce3b791ba9bf83053939960b4615e..3c08badd6162d03d9e3ca605712c1cb3376a17a2 100644
--- a/net/quic/quic_write_blocked_list.h
+++ b/net/quic/quic_write_blocked_list.h
@@ -24,7 +24,7 @@ class NET_EXPORT_PRIVATE QuicWriteBlockedList {
   static const QuicPriority kHighestPriority;
   static const QuicPriority kLowestPriority;
 
-  explicit QuicWriteBlockedList(bool avoid_duplicate_streams);
+  QuicWriteBlockedList();
   ~QuicWriteBlockedList();
 
   bool HasWriteBlockedDataStreams() const {
@@ -61,7 +61,6 @@ class NET_EXPORT_PRIVATE QuicWriteBlockedList {
     SpdyPriority priority =
         base_write_blocked_list_.GetHighestPriorityWriteBlockedList();
     QuicStreamId id = base_write_blocked_list_.PopFront(priority);
-    blocked_streams_.erase(id);
     return id;
   }
 
@@ -80,15 +79,8 @@ class NET_EXPORT_PRIVATE QuicWriteBlockedList {
       return;
     }
 
-    if (!base_write_blocked_list_.avoids_inserting_duplicates() &&
-        blocked_streams_.find(stream_id) != blocked_streams_.end()) {
-      DVLOG(1) << "Stream " << stream_id << " already in write blocked list.";
-      return;
-    }
-
     base_write_blocked_list_.PushBack(
         stream_id, static_cast<SpdyPriority>(priority));
-    blocked_streams_.insert(stream_id);
     return;
   }
 
@@ -100,11 +92,6 @@ class NET_EXPORT_PRIVATE QuicWriteBlockedList {
   bool crypto_stream_blocked_;
   bool headers_stream_blocked_;
 
-  // Keep track of write blocked streams in a set for faster membership checking
-  // than iterating over the base_write_blocked_list_. The contents of this set
-  // should mirror the contents of base_write_blocked_list_.
-  std::set<QuicStreamId> blocked_streams_;
-
   DISALLOW_COPY_AND_ASSIGN(QuicWriteBlockedList);
 };