Do speculative preconnection based on network traffic (not just DNS)

This rev also handles the triple of scheme/host/port for recording
both referrers and speculative connections, so that we
can soon support SSL warming as well as "mere" TCP/IP
preconnection.

r=mbelshe
Review URL: http://codereview.chromium.org/2563004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@50563 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 40 insertions, 0 deletions

diff --git a/chrome/browser/net/connect_interceptor.h b/chrome/browser/net/connect_interceptor.h
new file mode 100644
index 0000000..21a6b00
--- /dev/null
+++ b/chrome/browser/net/connect_interceptor.h
@@ -0,0 +1,40 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_NET_CONNECT_INTERCEPTOR_H_
+#define CHROME_BROWSER_NET_CONNECT_INTERCEPTOR_H_
+
+#include "net/url_request/url_request.h"
+
+namespace chrome_browser_net {
+
+//------------------------------------------------------------------------------
+// An interceptor to monitor URLRequests so that we can do speculative DNS
+// resolution and/or speculative TCP preconnections.
+class ConnectInterceptor : public URLRequest::Interceptor {
+ public:
+  // Construction includes registration as an URL.
+  ConnectInterceptor();
+  // Destruction includes unregistering.
+  virtual ~ConnectInterceptor();
+
+ protected:
+  // URLRequest::Interceptor overrides
+  // Learn about referrers, and optionally preconnect based on history.
+  virtual URLRequestJob* MaybeIntercept(URLRequest* request);
+  virtual URLRequestJob* MaybeInterceptResponse(URLRequest* request) {
+    return NULL;
+  }
+  virtual URLRequestJob* MaybeInterceptRedirect(URLRequest* request,
+                                                const GURL& location) {
+    return NULL;
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ConnectInterceptor);
+};
+
+}  // namespace chrome_browser_net
+
+#endif  // CHROME_BROWSER_NET_CONNECT_INTERCEPTOR_H_