Make URLRequestHttpJob the only URLRequestJob concerned with FilterContext.

net/url_request/url_request_file_job.cc

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
 // For loading files, we make use of overlapped i/o to ensure that reading from
 // the filesystem (e.g., a network filesystem) does not block the calling
 // thread.  An alternative approach would be to use a background thread or pool
 // of threads, but it seems better to leverage the operating system's ability
 // to do background file reads for us.
 //
 // Since overlapped reads require a 'static' buffer for the duration of the
@@ skipping 244 matching lines @@
     return false;
 
   *location = FilePathToFileURL(new_path);
   *http_status_code = 301;
   return true;
 #else
   return false;
 #endif
 }
 
-bool URLRequestFileJob::GetContentEncodings(
-    std::vector<Filter::FilterType>* encoding_types) {
-  DCHECK(encoding_types->empty());
-
+Filter* URLRequestFileJob::SetupFilter() const {
   // Bug 9936 - .svgz files needs to be decompressed.
-  if (LowerCaseEqualsASCII(file_path_.Extension(), ".svgz"))
-    encoding_types->push_back(Filter::FILTER_TYPE_GZIP);
-
-  return !encoding_types->empty();
+  return LowerCaseEqualsASCII(file_path_.Extension(), ".svgz")
+      ? Filter::GZipFactory() : NULL;
 }
 
 bool URLRequestFileJob::GetMimeType(std::string* mime_type) const {
   // URL requests should not block on the disk!  On Windows this goes to the
   // registry.
   //   http://code.google.com/p/chromium/issues/detail?id=59849
   base::ThreadRestrictions::ScopedAllowIO allow_io;
   DCHECK(request_);
   return GetMimeTypeFromFile(file_path_, mime_type);
 }
@@ skipping 97 matching lines @@
     NotifyDone(URLRequestStatus(URLRequestStatus::FAILED, result));
   }
 
   remaining_bytes_ -= result;
   DCHECK_GE(remaining_bytes_, 0);
 
   NotifyReadComplete(result);
 }
 
 }  // namespace net