[NTP Snippets] Cache images in a LevelDB

chrome/browser/search/suggestions/image_fetcher_impl.cc

 // 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.
 
 #include "chrome/browser/search/suggestions/image_fetcher_impl.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "chrome/browser/search/suggestions/image_decoder_impl.h"
@@ skipping 45 matching lines @@
         base::Bind(&ImageFetcherImpl::OnImageURLFetched,
                    base::Unretained(this), image_url));
   } else {
     // Request in progress. Register as an interested callback.
     it->second.callbacks.push_back(callback);
   }
 }
 
 void ImageFetcherImpl::OnImageURLFetched(const GURL& image_url,
                                          const std::string& image_data) {
-  // TODO(markusheintz): Add a method OnImageDataFetched on the delegate and
-  // call that here.
+  // Inform the ImageFetcherDelegate.
+  if (delegate_) {
+    auto it = pending_net_requests_.find(image_url);
+    DCHECK(it != pending_net_requests_.end());
+    delegate_->OnImageDataFetched(it->second.id, image_data);
+  }
+
   image_decoder_->DecodeImage(
       image_data,
       base::Bind(&ImageFetcherImpl::OnImageDecoded,
                  base::Unretained(this), image_url));
 }
 
 void ImageFetcherImpl::OnImageDecoded(const GURL& image_url,
                                       const gfx::Image& image) {
   // Get request for the given image_url from the request queue.
   ImageRequestMap::iterator image_iter = pending_net_requests_.find(image_url);
   DCHECK(image_iter != pending_net_requests_.end());
   ImageRequest* request = &image_iter->second;
 
   // Run all callbacks
   for (const auto& callback : request->callbacks) {
     callback.Run(request->id, image);
   }
 
   // Inform the ImageFetcherDelegate.
   if (delegate_) {
     delegate_->OnImageFetched(request->id, image);
   }
 
   // Erase the completed ImageRequest.
   pending_net_requests_.erase(image_iter);
 }
 
 }  // namespace suggestions