Basic HTTP pipelining support

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 c14dbb5e7427cafc1f94a3832f9d16b5bd919b0e..61f38980c013f5653a25028125ef53c37aab7a08 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -446,6 +446,11 @@ const char kEnableFastback[]                = "enable-fastback";
 // testing, for example page cycler and layout tests.  See bug 1157243.
 const char kEnableFileCookies[]             = "enable-file-cookies";
 
+// Enable HTTP pipelining. Attempt to pipeline HTTP connections. Heuristics will
+// try to figure out if pipelining can be used for a given host and request.
+// Without this flag, pipelining will never be used.
+const char kEnableHttpPipelining[]          = "enable-http-pipelining";
+
 // Enable the in-browser thumbnailing, which is more efficient than the
 // in-renderer thumbnailing, as we can use more information to determine
 // if we need to update thumbnails.