Extend FaviconService to support fetching favicons from a Google server

ios/chrome/browser/favicon/favicon_service_factory.cc

Index: ios/chrome/browser/favicon/favicon_service_factory.cc
diff --git a/ios/chrome/browser/favicon/favicon_service_factory.cc b/ios/chrome/browser/favicon/favicon_service_factory.cc
index 6f7cce1ad98bbe4121298a6775e2a3bb5bf43d4e..0b7f9dade360df7fa5f39ba7a795cf4114d13f8a 100644
--- a/ios/chrome/browser/favicon/favicon_service_factory.cc
+++ b/ios/chrome/browser/favicon/favicon_service_factory.cc
@@ -7,11 +7,14 @@
 #include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
 #include "components/favicon/core/favicon_service.h"
+#include "components/image_fetcher/image_decoder.h"
+#include "components/image_fetcher/image_fetcher_impl.h"
 #include "components/keyed_service/core/service_access_type.h"
 #include "components/keyed_service/ios/browser_state_dependency_manager.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/favicon/favicon_client_impl.h"
 #include "ios/chrome/browser/history/history_service_factory.h"
+#include "ios/chrome/browser/suggestions/ios_image_decoder_impl.h"
 
 namespace ios {
 
@@ -55,7 +58,10 @@ std::unique_ptr<KeyedService> FaviconServiceFactory::BuildServiceInstanceFor(
   return base::MakeUnique<favicon::FaviconService>(
       base::WrapUnique(new FaviconClientImpl(browser_state)),
       ios::HistoryServiceFactory::GetForBrowserState(
-          browser_state, ServiceAccessType::EXPLICIT_ACCESS));
+          browser_state, ServiceAccessType::EXPLICIT_ACCESS),
+      base::MakeUnique<image_fetcher::ImageFetcherImpl>(
+          base::MakeUnique<suggestions::IOSImageDecoderImpl>(),
+          browser_state->GetRequestContext()));
 }
 
 }  // namespace ios