Remove a bunch of unused network flags.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index d1bd254bd17ffbe55aa0701712c2118d561d34db..af9e7777e925b918a8f49015850ec8cecaf56537 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -627,12 +627,6 @@ const char kEnableHttp2Draft04[]            = "enable-http2-draft-04";
 // settings page.
 const char kEnableWebBasedSignin[]            = "enable-web-based-signin";
 
-// Enables IPv6 support, even if probes suggest that it may not be fully
-// supported. Some probes may require internet connections, and this flag will
-// allow support independent of application testing. This flag overrides
-// "disable-ipv6" which appears elswhere in this file.
-const char kEnableIPv6[]                    = "enable-ipv6";
-
 // Enables IP Pooling within the networks stack (SPDY only). When a connection
 // is needed for a domain which shares an IP with an existing connection,
 // attempt to use the existing connection.
@@ -739,11 +733,8 @@ const char kEnableQuicPortSelection[]       = "enable-quic-port-selection";
 // Enables save password prompt bubble.
 const char kEnableSavePasswordBubble[]      = "enable-save-password-bubble";
 
-// Controls the support for SDCH filtering (dictionary based expansion of
-// content). By default SDCH filtering is enabled. To disable SDCH filtering,
-// use "--enable-sdch=0" as command line argument. SDCH is currently only
-// supported server-side for searches on google.com.
-const char kEnableSdch[]                    = "enable-sdch";
+// Enables SDCH for https schemes.
+const char kEnableSdchOverHttps[] = "enable-sdch-over-https";
 
 // Controls which branch of the "search button in omnibox" experiment is
 // enabled.
@@ -764,10 +755,6 @@ const char kEnableSearchButtonInOmniboxForStrOrIip[] =
 // certificate is accompanied by, or contains, SCTs.
 const char kEnableSignedCertificateTimestampsViewer[] = "enable-sct-viewer";
 
-// Enable SPDY/2. This is a temporary testing flag. See
-// http://crbug.com/303957 .
-const char kEnableSpdy2[]                   = "enable-spdy2";
-
 // Enable SPDY/4 alpha 2. This is a temporary testing flag.
 const char kEnableSpdy4a2[]                 = "enable-spdy4a2";
 
@@ -1487,9 +1474,6 @@ const char kUseSpdy[]                       = "use-spdy";
 // This will only work if asynchronous spell checking is not disabled.
 const char kUseSpellingSuggestions[]        = "use-spelling-suggestions";
 
-// Sets the maximum concurrent streams over a SPDY session.
-const char kMaxSpdyConcurrentStreams[]      = "max-spdy-concurrent-streams";
-
 // Specifies the user data directory, which is where the browser will look for
 // all of its state.
 const char kUserDataDir[]                   = "user-data-dir";