components/image_fetcher: Expose RequestMetadata from ImageFetcher

chrome/browser/chromeos/hats/hats_notification_controller.cc

 // Copyright (c) 2016 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 "chrome/browser/chromeos/hats/hats_notification_controller.h"
 
 #include "ash/common/system/system_notifier.h"
 #include "ash/strings/grit/ash_strings.h"
 #include "base/command_line.h"
 #include "base/feature_list.h"
@@ skipping 224 matching lines @@
   image_fetcher_->StartOrQueueNetworkRequest(
       kImageFetcher1xId, GURL(kGoogleIcon1xUrl),
       base::Bind(&HatsNotificationController::OnImageFetched,
                  weak_pointer_factory_.GetWeakPtr()));
   image_fetcher_->StartOrQueueNetworkRequest(
       kImageFetcher2xId, GURL(kGoogleIcon2xUrl),
       base::Bind(&HatsNotificationController::OnImageFetched,
                  weak_pointer_factory_.GetWeakPtr()));
 }
 
-void HatsNotificationController::OnImageFetched(const std::string& id,
-                                                const gfx::Image& image) {
+void HatsNotificationController::OnImageFetched(
+    const std::string& id,
+    const gfx::Image& image,
+    const image_fetcher::RequestMetadata& metadata) {
   DCHECK(id == kImageFetcher1xId || id == kImageFetcher2xId);
 
   completed_requests_++;
   if (!image.IsEmpty()) {
     float scale = id == kImageFetcher1xId ? kScale_1x : kScale_2x;
     icon_.AddRepresentation(gfx::ImageSkiaRep(image.AsBitmap(), scale));
   }
 
   // Wait for both image fetcher requests to complete.
   if (completed_requests_ < 2)
@@ skipping 25 matching lines @@
       GURL(kNotificationOriginUrl), kNotificationId, optional, this);
 }
 
 void HatsNotificationController::UpdateLastInteractionTime() {
   PrefService* pref_service = profile_->GetPrefs();
   pref_service->SetInt64(prefs::kHatsLastInteractionTimestamp,
                          base::Time::Now().ToInternalValue());
 }
 
 }  // namespace chromeos