[Doodle] Add UMA for doodle image downloads

components/search_provider_logos/logo_tracker.h

 // Copyright 2014 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_SEARCH_PROVIDER_LOGOS_LOGO_TRACKER_H_
 #define COMPONENTS_SEARCH_PROVIDER_LOGOS_LOGO_TRACKER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 174 matching lines @@
 
   // Updates the metadata for the logo already stored in the cache.
   void SetCachedMetadata(const LogoMetadata& metadata);
 
   // Starts fetching the current logo over the network.
   void FetchLogo();
 
   // Called when the logo has been downloaded and parsed. |logo| will be NULL
   // if the server's response was invalid.
   void OnFreshLogoParsed(bool* parsing_failed,
+                         bool from_http_cache,
                          std::unique_ptr<EncodedLogo> logo);
 
   // Called when the fresh logo has been decoded into an SkBitmap. |image| will
   // be NULL if decoding failed.
   void OnFreshLogoAvailable(std::unique_ptr<EncodedLogo> logo,
                             bool parsing_failed,
+                            bool from_http_cache,
                             const SkBitmap& image);
 
   // net::URLFetcherDelegate:
   void OnURLFetchComplete(const net::URLFetcher* source) override;
   void OnURLFetchDownloadProgress(const net::URLFetcher* source,
                                   int64_t current,
                                   int64_t total,
                                   int64_t current_network_bytes) override;
 
   // The URL from which the logo is fetched.
@@ skipping 53 matching lines @@
   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
 
   base::WeakPtrFactory<LogoTracker> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LogoTracker);
 };
 
 }  // namespace search_provider_logos
 
 #endif  // COMPONENTS_SEARCH_PROVIDER_LOGOS_LOGO_TRACKER_H_