[ON HOLD] Implement pull-based design for content decoding

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..5ed21309637b8865d4fd1143f93bb2bfe3a99283 100644
--- a/net/url_request/url_request_file_job.cc
+++ b/net/url_request/url_request_file_job.cc
@@ -22,6 +22,7 @@
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_util.h"
+#include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_util.h"
 #include "base/synchronization/lock.h"
@@ -33,7 +34,8 @@
 #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_stream_source.h"
+#include "net/filter/stream_source.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"
@@ -145,11 +147,16 @@ 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;
+std::unique_ptr<StreamSource> URLRequestFileJob::SetupSource() {
+  std::unique_ptr<StreamSource> source = URLRequestJob::SetupSource();
+  if (!base::LowerCaseEqualsASCII(file_path_.Extension(), ".svgz"))
+    return source;
+
+  std::unique_ptr<GzipStreamSource> gzip(new GzipStreamSource(
+      std::move(source), GzipStreamSource::GZIP_STREAM_SOURCE_GZIP));
+  if (gzip->Init())
+    return std::move(gzip);
+  return nullptr;
 }
 
 bool URLRequestFileJob::GetMimeType(std::string* mime_type) const {