Refactor pooling logic into a helper method

net/http/http_util.h

Index: net/http/http_util.h
diff --git a/net/http/http_util.h b/net/http/http_util.h
index 14117c00289d22bd54c28398c28fdb99eb72a59f..dbd2f79cd0c85d0f18c27fc48b768cfd0726112b 100644
--- a/net/http/http_util.h
+++ b/net/http/http_util.h
@@ -21,6 +21,10 @@
 
 namespace net {
 
+class CertVerifyResult;
+class SSLInfo;
+class TransportSecurityState;
+
 class NET_EXPORT HttpUtil {
  public:
   // Returns the absolute path of the URL, to be used for the http request.
@@ -198,6 +202,13 @@ class NET_EXPORT HttpUtil {
   // returned by GetStatusCodesForHistogram.
   static int MapStatusCodeForHistogram(int code);
 
+  // Returns true if |hostname| can be pooled into an existing connection
+  // associated with |ssl_info|.
+  static bool CanPool(TransportSecurityState* transport_security_state,
+                      const SSLInfo& ssl_info,
+                      const std::string& old_hostname,
+                      const std::string& new_hostname);
+
   // Used to iterate over the name/value pairs of HTTP headers.  To iterate
   // over the values in a multi-value header, use ValuesIterator.
   // See AssembleRawHeaders for joining line continuations (this iterator