Report downloaded resources at most once

components/precache/core/precache_fetcher.h

 // Copyright 2013 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.
 
 #ifndef COMPONENTS_PRECACHE_CORE_PRECACHE_FETCHER_H_
 #define COMPONENTS_PRECACHE_CORE_PRECACHE_FETCHER_H_
 
 #include <stdint.h>
 
 #include <deque>
@@ skipping 31 matching lines @@
 // Visible for testing.
 extern const int kNoTracking;
 extern const int kMaxParallelFetches;
 
 // Information about the manifest for a host.
 struct ManifestHostInfo {
   ManifestHostInfo(int64_t manifest_id,
                    const std::string& hostname,
                    int64_t visits,
                    const std::string& used_url_hash,
-                   const std::string& unused_url_hash);
+                   const std::string& downloaded_url_hash);
   ~ManifestHostInfo();
   ManifestHostInfo(ManifestHostInfo&&);
   ManifestHostInfo& operator=(ManifestHostInfo&&);
   // Copy constructor and assignment operator are implicitly deleted.
 
   int64_t manifest_id;
   std::string hostname;
   GURL manifest_url;
   int64_t visits;
   std::string used_url_hash;
-  std::string unused_url_hash;
+  std::string downloaded_url_hash;
 };
 
 // Information about a resource to be downloaded.
 struct ResourceInfo {
   ResourceInfo(const GURL& url, const std::string& referrer, double weight);
   ~ResourceInfo();
   ResourceInfo(ResourceInfo&&);
   ResourceInfo& operator=(ResourceInfo&&);
   // Copy constructor and assignment operator are implicitly deleted.
 
@@ skipping 262 matching lines @@
   int64_t response_bytes_;
   int64_t network_response_bytes_;
   bool was_cached_;
 
   DISALLOW_COPY_AND_ASSIGN(Fetcher);
 };
 
 }  // namespace precache
 
 #endif  // COMPONENTS_PRECACHE_CORE_PRECACHE_FETCHER_H_