relnote: QUIC streamable frames can now use a freelist for their packet buffers, Guarded by gfe2_fe…

net/quic/quic_protocol.h

Index: net/quic/quic_protocol.h
diff --git a/net/quic/quic_protocol.h b/net/quic/quic_protocol.h
index 29214034c0e3eb3c87b8433b937c9bd4c0b90ce6..9ea4ee4074a7ef156d5750c03ed94ed93c31c14d 100644
--- a/net/quic/quic_protocol.h
+++ b/net/quic/quic_protocol.h
@@ -740,8 +740,17 @@ class NET_EXPORT_PRIVATE QuicBufferAllocator {
   // Returns or allocates a new buffer of |size|. Never returns null.
   virtual char* New(size_t size) = 0;
 
+  // Returns or allocates a new buffer of |size| if |flag_enable| is true.
+  // Otherwise, returns a buffer that is compatible with this class directly
+  // with operator new. Never returns null.
+  virtual char* New(size_t size, bool flag_enable) = 0;
+
   // Releases a buffer.
   virtual void Delete(char* buffer) = 0;
+
+  // Marks the allocator as being idle. Serves as a hint to notify the allocator
+  // that it should release any resources it's still holding on to.
+  virtual void MarkAllocatorIdle() {}
 };
 
 // Deleter for stream buffers. Copyable to support platforms where the deleter