[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 6204faa4d2abc55ccade5d7314c87c8baac2dcb2..8c7a9eb0f49011bb947b7da020e69ca127f48da8 100644
--- a/net/url_request/url_request_http_job.cc
+++ b/net/url_request/url_request_http_job.cc
@@ -230,7 +230,7 @@ URLRequestHttpJob::~URLRequestHttpJob() {
   }
   // Make sure SDCH filters are told to emit histogram data while
   // filter_context_ is still alive.
-  DestroyFilters();
+  // DestroyFilters();
 
   DoneWithRequest(ABORTED);
 }
@@ -1085,27 +1085,21 @@ void URLRequestHttpJob::PopulateNetErrorDetails(
   return transaction_->PopulateNetErrorDetails(details);
 }
 
-Filter* URLRequestHttpJob::SetupFilter() const {
+scoped_ptr<StreamSource> URLRequestHttpJob::SetupSource() {
   DCHECK(transaction_.get());
   if (!response_info_)
     return NULL;
 
-  std::vector<Filter::FilterType> encoding_types;
   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(Filter::ConvertEncodingToType(encoding_type));
+    encoding_types.push_back(base::ToLowerASCII(encoding_type));
   }
 
-  // Even if encoding types are empty, there is a chance that we need to add
-  // some decoding, as some proxies strip encoding completely. In such cases,
-  // we may need to add (for example) SDCH filtering (when the context suggests
-  // it is appropriate).
-  Filter::FixupEncodingTypes(*filter_context_, &encoding_types);
-
-  return !encoding_types.empty()
-      ? Filter::Factory(encoding_types, *filter_context_) : NULL;
+  return StreamSource::BuildSourceChain(URLRequestJob::SetupSource(),
+                                        encoding_types, nullptr);
 }
 
 bool URLRequestHttpJob::CopyFragmentOnRedirect(const GURL& location) const {