[DevTools] Always report encodedDataLength in Network.ResponseReceived.

content/browser/loader/async_resource_handler.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/loader/async_resource_handler.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 333 matching lines @@
     waiting_for_upload_progress_ack_ = false;
     ReportUploadProgress();
   }
 
   if (rdh_->delegate()) {
     rdh_->delegate()->OnResponseStarted(request(), info->GetContext(),
                                         response);
   }
 
   NetLogObserver::PopulateResponseInfo(request(), response);
+  response->head.encoded_data_length = request()->raw_header_size();
 
   const HostZoomMapImpl* host_zoom_map =
       static_cast<const HostZoomMapImpl*>(info->filter()->GetHostZoomMap());
 
   if (info->GetResourceType() == RESOURCE_TYPE_MAIN_FRAME && host_zoom_map) {
     const GURL& request_url = request()->url();
     int render_process_id = info->GetChildID();
     int render_view_id = info->GetRouteID();
 
     double zoom_level = host_zoom_map->GetZoomLevelForView(
@@ skipping 72 matching lines @@
   DCHECK_GE(bytes_read, 0);
 
   if (!bytes_read)
     return true;
 
   ResourceMessageFilter* filter = GetFilter();
   if (!filter)
     return false;
 
   int encoded_data_length = CalculateEncodedDataLengthToReport();
+  if (!first_chunk_read_)
+    encoded_data_length -= request()->raw_header_size();
+
   int encoded_body_length = CalculateEncodedBodyLengthToReport();
+  first_chunk_read_ = true;
 
   // Return early if InliningHelper handled the received data.
   if (inlining_helper_->SendInlinedDataIfApplicable(
           bytes_read, encoded_data_length, encoded_body_length, filter,
           GetRequestID()))
     return true;
 
   buffer_->ShrinkLastAllocation(bytes_read);
 
   if (!sent_data_buffer_msg_) {
@@ skipping 144 matching lines @@
   } else {
     UMA_HISTOGRAM_CUSTOM_COUNTS(
         "Net.ResourceLoader.ResponseStartToEnd.Over_512kB",
         elapsed_time, 1, 100000, 100);
   }
 
   inlining_helper_->RecordHistogram(elapsed_time);
 }
 
 }  // namespace content