Change return type of FaviconTabHelper::GetFavicon() to gfx::Image.

chrome/browser/instant/instant_loader.cc

Index: chrome/browser/instant/instant_loader.cc
diff --git a/chrome/browser/instant/instant_loader.cc b/chrome/browser/instant/instant_loader.cc
index e4f188538bdddffa530e361281a3e99a005e2a9a..41c9c856daa4abdaf84ed53a3b6c399b34c49ead 100644
--- a/chrome/browser/instant/instant_loader.cc
+++ b/chrome/browser/instant/instant_loader.cc
@@ -379,8 +379,8 @@ void InstantLoader::WebContentsDelegateImpl::CommitHistory(
       !active_entry->GetFavicon().image.IsEmpty()) {
     std::vector<unsigned char> image_data;
     // TODO: Add all variants once the history service supports it.
-    gfx::PNGCodec::EncodeBGRASkBitmap(active_entry->GetFavicon().AsBitmap(),
-                                      false, &image_data);
+    gfx::PNGCodec::EncodeBGRASkBitmap(
+        active_entry->GetFavicon().image.AsBitmap(), false, &image_data);
     favicon_service->SetFavicon(active_entry->GetURL(),
                                 active_entry->GetFavicon().url,
                                 image_data,