Extend FaviconService to support fetching favicons from a Google server

components/favicon/content/content_favicon_driver_unittest.cc

Index: components/favicon/content/content_favicon_driver_unittest.cc
diff --git a/components/favicon/content/content_favicon_driver_unittest.cc b/components/favicon/content/content_favicon_driver_unittest.cc
index ad19e9523446f9d3d4b69f86267cca5bee0a873d..6c5fd656c1fdf3dc228a9c2fdb535db606ee6dce 100644
--- a/components/favicon/content/content_favicon_driver_unittest.cc
+++ b/components/favicon/content/content_favicon_driver_unittest.cc
@@ -10,6 +10,7 @@
 #include "components/favicon/core/favicon_client.h"
 #include "components/favicon/core/favicon_handler.h"
 #include "components/favicon/core/favicon_service.h"
+#include "components/image_fetcher/image_fetcher.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/common/favicon_url.h"
 #include "content/public/test/test_renderer_host.h"
@@ -30,7 +31,7 @@ class ContentFaviconDriverTest : public content::RenderViewHostTestHarness {
   void SetUp() override {
     RenderViewHostTestHarness::SetUp();
 
-    favicon_service_.reset(new FaviconService(nullptr, nullptr));
+    favicon_service_.reset(new FaviconService(nullptr, nullptr, nullptr));
     ContentFaviconDriver::CreateForWebContents(
         web_contents(), favicon_service(), nullptr, nullptr);
   }