QUIC - Moved FindOrNull and FindOrDie to a separate files.

net/tools/quic/test_tools/packet_dropping_test_writer.cc

Index: net/tools/quic/test_tools/packet_dropping_test_writer.cc
diff --git a/net/tools/quic/test_tools/packet_dropping_test_writer.cc b/net/tools/quic/test_tools/packet_dropping_test_writer.cc
index 24ec69867d0a89436bbe1a53128b6835ffb350ba..b3b7ca22e70eafbf34e67b027bc1227be529f912 100644
--- a/net/tools/quic/test_tools/packet_dropping_test_writer.cc
+++ b/net/tools/quic/test_tools/packet_dropping_test_writer.cc
@@ -23,7 +23,7 @@ class WriteUnblockedAlarm : public QuicAlarm::Delegate {
 
   virtual QuicTime OnAlarm() OVERRIDE {
     DCHECK(writer_->blocked_writer());
-    DLOG(INFO) << "Unblocking socket.";
+    DVLOG(1) << "Unblocking socket.";
     writer_->blocked_writer()->OnCanWrite();
     return QuicTime::Zero();
   }