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

net/url_request/url_request_http_job.cc

Index: net/url_request/url_request_http_job.cc
diff --git a/net/url_request/url_request_http_job.cc b/net/url_request/url_request_http_job.cc
index 68d5ed9e898ec47c298f481c212359d1b5c3f654..b0656021caf3d578a06cd03324585903a279d7bd 100644
--- a/net/url_request/url_request_http_job.cc
+++ b/net/url_request/url_request_http_job.cc
@@ -1168,6 +1168,7 @@ void URLRequestHttpJob::PopulateNetErrorDetails(
   return transaction_->PopulateNetErrorDetails(details);
 }
 
+#if 0
 Filter* URLRequestHttpJob::SetupFilter() const {
   DCHECK(transaction_.get());
   if (!response_info_)
@@ -1190,6 +1191,23 @@ Filter* URLRequestHttpJob::SetupFilter() const {
   return !encoding_types.empty()
       ? Filter::Factory(encoding_types, *filter_context_) : NULL;
 }
+#endif
+scoped_ptr<StreamSource> URLRequestHttpJob::SetupSource() {
+  DCHECK(transaction_.get());
+  if (!response_info_)
+    return NULL;
+
+  std::string encoding_type;
+  std::vector<std::string> encoding_types;
+  HttpResponseHeaders* headers = GetResponseHeaders();
+  size_t iter = 0;
+  while (headers->EnumerateHeader(&iter, "Content-Encoding", &encoding_type)) {
+    encoding_types.push_back(base::ToLowerASCII(encoding_type));
+  }
+
+  return StreamSource::BuildSourceChain(URLRequestJob::SetupSource(),
+                                        encoding_types, nullptr);
+}
 
 bool URLRequestHttpJob::CopyFragmentOnRedirect(const GURL& location) const {
   // Allow modification of reference fragments by default, unless