Restructure SDCH layering to allow more separation (observer/1->[0,n]

net/base/sdch_observer.cc

 // Copyright 2014 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.
 
-#include "net/url_request/redirect_info.h"
+#include "net/base/sdch_observer.h"
+
+#include "base/logging.h"
+#include "net/base/sdch_manager.h"
 
 namespace net {
 
-RedirectInfo::RedirectInfo() : status_code(-1) {}
+SdchObserver::~SdchObserver() {}
 
-RedirectInfo::~RedirectInfo() {}
-
-}  // namespace net
+}