Send the ClientHello handshake message. Fix a bug in

net/quic/test_tools/quic_test_utils.h

Index: net/quic/test_tools/quic_test_utils.h
===================================================================
--- net/quic/test_tools/quic_test_utils.h	(revision 174485)
+++ net/quic/test_tools/quic_test_utils.h	(working copy)
@@ -32,6 +32,11 @@
 // Constructs a basic crypto handshake message
 QuicPacket* ConstructHandshakePacket(QuicGuid guid, CryptoTag tag);
 
+// Constructs a ClientHello crypto handshake message
+QuicPacket* ConstructClientHelloPacket(QuicGuid guid,
+                                       QuicClock* clock,
+                                       QuicRandom* random_generator);
+
 class MockFramerVisitor : public QuicFramerVisitorInterface {
  public:
   MockFramerVisitor();