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 28b907697ca8319617c3582092a9192a87539b78..242cbf62fde430a3d2229cb72c866d712ce6acf0 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -450,6 +450,11 @@ const char kEnableFileCookies[]             = "enable-file-cookies";
 const char kEnableImprovedDownloadProtection[] =
     "enable-improved-download-protection";
 
+// 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.