Reject unadvertised encodings

net/filter/filter_source_stream.cc

Index: net/filter/filter_source_stream.cc
diff --git a/net/filter/filter_source_stream.cc b/net/filter/filter_source_stream.cc
index 603bd703c8e7311744fc74e0ae868a383d0cb518..deb3af7f20b0b0653272a7d383a13431909698a3 100644
--- a/net/filter/filter_source_stream.cc
+++ b/net/filter/filter_source_stream.cc
@@ -67,6 +67,11 @@ std::string FilterSourceStream::Description() const {
   return next_type_string + "," + GetTypeAsString();
 }
 
+void FilterSourceStream::ReportContentDecodingFailed(SourceType type) {
+  UMA_HISTOGRAM_ENUMERATION("Net.ContentDecodingFailed2.FilterType", type,
+                            TYPE_MAX);
+}
+
 int FilterSourceStream::DoLoop(int result) {
   DCHECK_NE(STATE_NONE, next_state_);
 
@@ -135,10 +140,8 @@ int FilterSourceStream::DoFilterData() {
   DCHECK(bytes_output != 0 ||
          consumed_bytes == drainable_input_buffer_->BytesRemaining());
 
-  if (bytes_output == ERR_CONTENT_DECODING_FAILED) {
-    UMA_HISTOGRAM_ENUMERATION("Net.ContentDecodingFailed2.FilterType", type(),
-                              TYPE_MAX);
-  }
+  if (bytes_output == ERR_CONTENT_DECODING_FAILED)
+    ReportContentDecodingFailed(type());
   // FilterData() is not allowed to return ERR_IO_PENDING.
   DCHECK_NE(ERR_IO_PENDING, bytes_output);