Switch to use net::FilterSourceStream from net::Filter

net/url_request/url_request_file_job.cc

Index: net/url_request/url_request_file_job.cc
diff --git a/net/url_request/url_request_file_job.cc b/net/url_request/url_request_file_job.cc
index fb224764895ea0f77d24bb488d4b4a85ad92531b..8f96f404c9125dfb37c090b06d2ac1810fdde2bf 100644
--- a/net/url_request/url_request_file_job.cc
+++ b/net/url_request/url_request_file_job.cc
@@ -33,7 +33,8 @@
 #include "net/base/io_buffer.h"
 #include "net/base/load_flags.h"
 #include "net/base/mime_util.h"
-#include "net/filter/filter.h"
+#include "net/filter/gzip_source_stream.h"
+#include "net/filter/source_stream.h"
 #include "net/http/http_util.h"
 #include "net/url_request/url_request_error_job.h"
 #include "net/url_request/url_request_file_dir_job.h"
@@ -145,13 +146,6 @@ bool URLRequestFileJob::IsRedirectResponse(GURL* location,
 #endif
 }
 
-std::unique_ptr<Filter> URLRequestFileJob::SetupFilter() const {
-  // Bug 9936 - .svgz files needs to be decompressed.
-  return base::LowerCaseEqualsASCII(file_path_.Extension(), ".svgz")
-             ? Filter::GZipFactory()
-             : nullptr;
-}
-
 bool URLRequestFileJob::GetMimeType(std::string* mime_type) const {
   DCHECK(request_);
   if (meta_info_.mime_type_result) {
@@ -192,6 +186,14 @@ void URLRequestFileJob::OnReadComplete(IOBuffer* buf, int result) {
 URLRequestFileJob::~URLRequestFileJob() {
 }
 
+std::unique_ptr<SourceStream> URLRequestFileJob::SetUpSourceStream() {
+  std::unique_ptr<SourceStream> source = URLRequestJob::SetUpSourceStream();
+  if (!base::LowerCaseEqualsASCII(file_path_.Extension(), ".svgz"))
+    return source;
+
+  return GzipSourceStream::Create(std::move(source), SourceStream::TYPE_GZIP);
+}
+
 void URLRequestFileJob::FetchMetaInfo(const base::FilePath& file_path,
                                       FileMetaInfo* meta_info) {
   base::File::Info file_info;