components/image_fetcher: Expose RequestMetadata from ImageFetcher

chrome/browser/search/suggestions/image_fetcher_impl_browsertest.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 "components/image_fetcher/image_fetcher_impl.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
@@ skipping 67 matching lines @@
     ImageFetcherImpl* fetcher =
         new ImageFetcherImpl(
             base::MakeUnique<suggestions::ImageDecoderImpl>(),
             browser()->profile()->GetRequestContext());
     fetcher->SetImageFetcherDelegate(&delegate_);
     return fetcher;
   }
 
   void OnImageAvailable(base::RunLoop* loop,
                         const std::string& id,
-                        const gfx::Image& image) {
+                        const gfx::Image& image,
+                        const image_fetcher::RequestMetadata& metadata) {
     if (!image.IsEmpty()) {
       num_callback_valid_called_++;
     } else {
       num_callback_null_called_++;
     }
     loop->Quit();
   }
 
   void StartOrQueueNetworkRequestHelper(const GURL& image_url) {
     std::unique_ptr<ImageFetcherImpl> image_fetcher_(CreateImageFetcher());
@@ skipping 43 matching lines @@
   GURL invalid_image_url(test_server_.GetURL(kInvalidImagePath).spec());
   StartOrQueueNetworkRequestHelper(invalid_image_url);
 
   EXPECT_EQ(0, num_callback_valid_called_);
   EXPECT_EQ(1, num_callback_null_called_);
   EXPECT_EQ(0, delegate_.num_delegate_valid_called());
   EXPECT_EQ(1, delegate_.num_delegate_null_called());
 }
 
 }  // namespace suggestions