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diff --git a/chromium/content/browser/appcache/appcache_interceptor.h b/chromium/content/browser/appcache/appcache_interceptor.h
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+++ b/chromium/content/browser/appcache/appcache_interceptor.h
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+// 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.
+
+#ifndef CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_
+#define CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_
+
+#include "base/memory/singleton.h"
+#include "content/common/content_export.h"
+#include "net/url_request/url_request.h"
+#include "url/gurl.h"
+#include "webkit/common/resource_type.h"
+
+namespace appcache {
+class AppCacheRequestHandler;
+class AppCacheServiceImpl;
+}
+
+namespace content {
+
+// An interceptor to hijack requests and potentially service them out of
+// the appcache.
+class CONTENT_EXPORT AppCacheInterceptor
+    : public net::URLRequest::Interceptor {
+ public:
+  // Registers a singleton instance with the net library.
+  // Should be called early in the IO thread prior to initiating requests.
+  static void EnsureRegistered() {
+    CHECK(GetInstance());
+  }
+
+  // Must be called to make a request eligible for retrieval from an appcache.
+  static void SetExtraRequestInfo(net::URLRequest* request,
+                                  appcache::AppCacheServiceImpl* service,
+                                  int process_id,
+                                  int host_id,
+                                  ResourceType::Type resource_type);
+
+  // May be called after response headers are complete to retrieve extra
+  // info about the response.
+  static void GetExtraResponseInfo(net::URLRequest* request,
+                                   int64* cache_id,
+                                   GURL* manifest_url);
+
+  // Methods to support cross site navigations.
+  static void PrepareForCrossSiteTransfer(net::URLRequest* request,
+                                          int old_process_id);
+  static void CompleteCrossSiteTransfer(net::URLRequest* request,
+                                        int new_process_id,
+                                        int new_host_id);
+
+  static AppCacheInterceptor* GetInstance();
+
+ protected:
+  // Override from net::URLRequest::Interceptor:
+  virtual net::URLRequestJob* MaybeIntercept(
+      net::URLRequest* request,
+      net::NetworkDelegate* network_delegate) OVERRIDE;
+  virtual net::URLRequestJob* MaybeInterceptResponse(
+      net::URLRequest* request,
+      net::NetworkDelegate* network_delegate) OVERRIDE;
+  virtual net::URLRequestJob* MaybeInterceptRedirect(
+      net::URLRequest* request,
+      net::NetworkDelegate* network_delegate,
+      const GURL& location) OVERRIDE;
+
+ private:
+  friend struct DefaultSingletonTraits<AppCacheInterceptor>;
+
+  AppCacheInterceptor();
+  virtual ~AppCacheInterceptor();
+
+  static void SetHandler(net::URLRequest* request,
+                         appcache::AppCacheRequestHandler* handler);
+  static appcache::AppCacheRequestHandler* GetHandler(net::URLRequest* request);
+
+  DISALLOW_COPY_AND_ASSIGN(AppCacheInterceptor);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_