Remove net::Filter direct dependency on IsSupportedMimeType

net/base/network_delegate_impl.h

 // 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 NET_BASE_NETWORK_DELEGATE_IMPL_H_
 #define NET_BASE_NETWORK_DELEGATE_IMPL_H_
 
 #include "base/strings/string16.h"
 #include "net/base/completion_callback.h"
 #include "net/base/network_delegate.h"
@@ skipping 175 matching lines @@
 
   // Called when the |referrer_url| for requesting |target_url| during handling
   // of the |request| is does not comply with the referrer policy (e.g. a
   // secure referrer for an insecure initial target).
   // Returns true if the request should be cancelled. Otherwise, the referrer
   // header is stripped from the request.
   bool OnCancelURLRequestWithPolicyViolatingReferrerHeader(
       const URLRequest& request,
       const GURL& target_url,
       const GURL& referrer_url) const override;
+
+  // If we get a response with GZIP encoding, we check if the response mime
+  // type is one of the supported mime types. If it is supported, we will
+  // decompress response to allow it to be displayed directly in browser,
+  // otherwise we'll leave it compressed.
+  bool OnIsSupportedMimeType(const std::string& mime_type) const override;
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_NETWORK_DELEGATE_IMPL_H_