Remove a bunch of unused network flags.

chrome/common/chrome_switches.h

Index: chrome/common/chrome_switches.h
diff --git a/chrome/common/chrome_switches.h b/chrome/common/chrome_switches.h
index 05ff656a2f46369fc6bee5c11919052cd21616f9..e0a0e97bd1c8a70bdf551dfd0c02210d89154dae 100644
--- a/chrome/common/chrome_switches.h
+++ b/chrome/common/chrome_switches.h
@@ -183,7 +183,6 @@ extern const char kEnableGoogleNowIntegration[];
 extern const char kEnableHttp2Draft04[];
 extern const char kEnableWebBasedSignin[];
 extern const char kEnableIPPooling[];
-extern const char kEnableIPv6[];
 extern const char kEnableLinkableEphemeralApps[];
 extern const char kEnableLocalFirstLoadNTP[];
 extern const char kEnableManagedStorage[];
@@ -213,12 +212,11 @@ extern const char kEnableQuicHttps[];
 extern const char kEnableQuicPortSelection[];
 extern const char kEnableResourceContentSettings[];
 extern const char kEnableSavePasswordBubble[];
-extern const char kEnableSdch[];
+extern const char kEnableSdchOverHttps[];
 extern const char kEnableSearchButtonInOmniboxAlways[];
 extern const char kEnableSearchButtonInOmniboxForStr[];
 extern const char kEnableSearchButtonInOmniboxForStrOrIip[];
 extern const char kEnableSignedCertificateTimestampsViewer[];
-extern const char kEnableSpdy2[];
 extern const char kEnableSpdy4a2[];
 extern const char kEnableSpellingAutoCorrect[];
 extern const char kEnableSpellingFeedbackFieldTrial[];
@@ -399,7 +397,6 @@ extern const char kUnlimitedStorage[];
 extern const char kUseSimpleCacheBackend[];
 extern const char kUseSpdy[];
 extern const char kUseSpellingSuggestions[];
-extern const char kMaxSpdyConcurrentStreams[];
 extern const char kUserDataDir[];
 extern const char kValidateCrx[];
 extern const char kVariationsServerURL[];