components/image_fetcher: Expose RequestMetadata from ImageFetcher

components/suggestions/image_manager_unittest.cc

Index: components/suggestions/image_manager_unittest.cc
diff --git a/components/suggestions/image_manager_unittest.cc b/components/suggestions/image_manager_unittest.cc
index 4244be925ac947eba153b893d163d167caf19e2a..eb0cd0315f2a870bb96873f30c22680fdc4e5ecf 100644
--- a/components/suggestions/image_manager_unittest.cc
+++ b/components/suggestions/image_manager_unittest.cc
@@ -49,9 +49,9 @@ class MockImageFetcher : public ImageFetcher {
   MockImageFetcher() {}
   virtual ~MockImageFetcher() {}
   MOCK_METHOD3(StartOrQueueNetworkRequest,
-               void(const std::string&, const GURL&,
-                    base::Callback<void(const std::string&,
-                                        const gfx::Image&)>));
+               void(const std::string&,
+                    const GURL&,
+                    const ImageFetcherCallback&));
   MOCK_METHOD1(SetImageFetcherDelegate, void(ImageFetcherDelegate*));
   MOCK_METHOD1(SetDataUseServiceName, void(DataUseServiceName));
   MOCK_METHOD1(SetDesiredImageFrameSize, void(const gfx::Size&));