[Local NTP] Fix chrome://large-icon fallback when no favicon is found.

components/favicon/core/large_icon_service.cc

Index: components/favicon/core/large_icon_service.cc
diff --git a/components/favicon/core/large_icon_service.cc b/components/favicon/core/large_icon_service.cc
index 702761c82d8adc1a3510a8deb612b157f406dc93..499c42ba9b3e218a4ac5803011f2108262b28cca 100644
--- a/components/favicon/core/large_icon_service.cc
+++ b/components/favicon/core/large_icon_service.cc
@@ -47,6 +47,7 @@ void LargeIconService::RunLargeIconCallback(
   // default |fallback_icon_style|.
   favicon_base::LargeIconResult result;
   if (!bitmap_result.is_valid()) {
+    result.fallback_icon_style.reset(new favicon_base::FallbackIconStyle());

[pkotwicz, 2015/04/27 17:49:02]

Sorry that I missed this. How about adding two new constructors for
LargeIconResult, one which takes a FallbackIconStyle and another which takes in
FaviconRawBitmapResult and removing the default constructor?

[huangs, 2015/04/27 18:16:04]

Done.

     callback.Run(result);
     return;
   }