QUIC - Browser shutdown crash fix. Accessing disk_cache's backend after

net/http/disk_cache_based_quic_server_info.cc

Index: net/http/disk_cache_based_quic_server_info.cc
diff --git a/net/http/disk_cache_based_quic_server_info.cc b/net/http/disk_cache_based_quic_server_info.cc
index 6a5ee175d5187f8773a75d2c88f8dc26415e26f5..303e13d63d2bf51044a97edf16591b3ef2fcd42b 100644
--- a/net/http/disk_cache_based_quic_server_info.cc
+++ b/net/http/disk_cache_based_quic_server_info.cc
@@ -104,7 +104,10 @@ int DiskCacheBasedQuicServerInfo::WaitForDataReady(
 void DiskCacheBasedQuicServerInfo::CancelWaitForDataReadyCallback() {
   DCHECK(CalledOnValidThread());
 
-  RecordQuicServerInfoStatus(QUIC_SERVER_INFO_WAIT_FOR_DATA_READY_CANCEL);
+  // TODO(rtenneti): crbug.com/456524. Implement a better fix. During shutdown,
+  // HttpCache could be deleted and leads to crash because backend_ is deleted.
+  // Temporary weekend fix is to return without collecting data in histograms.
+  // RecordQuicServerInfoStatus(QUIC_SERVER_INFO_WAIT_FOR_DATA_READY_CANCEL);
   if (!wait_for_ready_callback_.is_null()) {
     RecordLastFailure();
     wait_for_ready_callback_.Reset();