Let QUIC streams write 16k before ceding. Behind FLAG_quic_batch_writes.

net/spdy/write_blocked_list_test.cc

Index: net/spdy/write_blocked_list_test.cc
diff --git a/net/spdy/write_blocked_list_test.cc b/net/spdy/write_blocked_list_test.cc
index 20a1b7e43d009710852a12604b595f6869714e7c..933dc715b8fe7ac813147b24fbd4c18235cc414e 100644
--- a/net/spdy/write_blocked_list_test.cc
+++ b/net/spdy/write_blocked_list_test.cc
@@ -78,6 +78,34 @@ TEST_F(WriteBlockedListTest, PopFront) {
   EXPECT_EQ(3, list.PopFront(4));
 }
 
+TEST_F(WriteBlockedListTest, PushFront) {
+  list.PushFront(1, 4);
+  EXPECT_EQ(1u, list.NumBlockedStreams());
+  list.PushFront(2, 4);
+  list.PushFront(1, 4);
+  list.PushFront(3, 4);
+  EXPECT_EQ(3u, list.NumBlockedStreams());
+
+  EXPECT_EQ(3, list.PopFront(4));
+  EXPECT_EQ(2, list.PopFront(4));
+  EXPECT_EQ(1u, list.NumBlockedStreams());
+  EXPECT_EQ(1, list.PopFront(4));
+}
+
+TEST_F(WriteBlockedListTest, PushFrontAndBack) {
+  list.PushFront(1, 4);
+  list.PushBack(5, 4);
+  list.PushFront(2, 4);
+  list.PushBack(3, 4);
+  list.PushFront(4, 4);
+
+  EXPECT_EQ(4, list.PopFront(4));
+  EXPECT_EQ(2, list.PopFront(4));
+  EXPECT_EQ(1, list.PopFront(4));
+  EXPECT_EQ(5, list.PopFront(4));
+  EXPECT_EQ(3, list.PopFront(4));
+}
+
 TEST_F(WriteBlockedListTest, UpdateStreamPriorityInWriteBlockedList) {
   list.PushBack(1, 1);
   list.PushBack(2, 2);