Remove the --use-spdy-over-quic command line option. Always use SPDY over QUIC.

chrome/common/chrome_switches.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Defines all the command-line switches used by Chrome.
 
 #ifndef CHROME_COMMON_CHROME_SWITCHES_H_
 #define CHROME_COMMON_CHROME_SWITCHES_H_
 
 #include "build/build_config.h"
@@ skipping 342 matching lines @@
 extern const char kTabBrowserDragging[];
 extern const char kTabCapture[];
 extern const char kTestNaClSandbox[];
 extern const char kTestName[];
 extern const char kTestType[];
 extern const char kTestingChannelID[];
 extern const char kTrustedSpdyProxy[];
 extern const char kTryChromeAgain[];
 extern const char kUninstall[];
 extern const char kUseSpdy[];
-extern const char kUseSpdyOverQuic[];
 extern const char kUseSpellingSuggestions[];
 extern const char kMaxSpdySessionsPerDomain[];
 extern const char kMaxSpdyConcurrentStreams[];
 extern const char kUserDataDir[];
 extern const char kUseClientLoginSigninFlow[];
 extern const char kVariationsServerURL[];
 extern const char kVersion[];
 extern const char kViewerConnection[];
 extern const char kVisitURLs[];
 extern const char kWalletSecureServiceUrl[];
@@ skipping 104 matching lines @@
 #else
 extern const char kEnablePrintPreview[];
 #endif
 
 // DON'T ADD RANDOM STUFF HERE. Put it in the main section above in
 // alphabetical order, or in one of the ifdefs (also in order in each section).
 
 }  // namespace switches
 
 #endif  // CHROME_COMMON_CHROME_SWITCHES_H_