media: Send chrome-cache: frfr on first request.

media/blink/url_index.cc

 // Copyright 2015 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 <set>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 62 matching lines @@
   if (ValidateDataOrigin(other->data_origin_)) {
     DCHECK(thread_checker_.CalledOnValidThread());
     valid_until_ = std::max(valid_until_, other->valid_until_);
     // set_length() will not override the length if already known.
     set_length(other->length_);
     cacheable_ |= other->cacheable_;
     range_supported_ |= other->range_supported_;
     if (last_modified_.is_null()) {
       last_modified_ = other->last_modified_;
     }
+    bytes_read_from_cache_ += other->bytes_read_from_cache_;
     multibuffer()->MergeFrom(other->multibuffer());
   }
 }
 
 void UrlData::set_cacheable(bool cacheable) {
   DCHECK(thread_checker_.CalledOnValidThread());
   cacheable_ = cacheable;
 }
 
 void UrlData::set_length(int64_t length) {
@@ skipping 175 matching lines @@
          url_data->CachedSize() > (*by_url_slot)->CachedSize())) {
       *by_url_slot = url_data;
     } else {
       (*by_url_slot)->MergeFrom(url_data);
     }
   }
   return *by_url_slot;
 }
 
 }  // namespace media