Remove unused ThumbnailDatabase::UpdateIconMapping() and ThumbnailDatabase::CloneIconMappings()

BUG=None
TEST=None

Review URL: https://codereview.chromium.org/1055173003

Cr-Commit-Position: refs/heads/master@{#324267}

2 files changed, 0 insertions, 13 deletions

diff --git a/components/favicon/core/favicon_service.cc b/components/favicon/core/favicon_service.cc
index dd1ada4c..31c7041 100644
--- a/components/favicon/core/favicon_service.cc
+++ b/components/favicon/core/favicon_service.cc
@@ -231,12 +231,6 @@ void FaviconService::SetFaviconOutOfDateForPage(const GURL& page_url) {
     history_service_->SetFaviconsOutOfDateForPage(page_url);
 }
 
-void FaviconService::CloneFavicon(const GURL& old_page_url,
-                                  const GURL& new_page_url) {
-  if (history_service_)
-    history_service_->CloneFavicons(old_page_url, new_page_url);
-}
-
 void FaviconService::SetImportedFavicons(
     const favicon_base::FaviconUsageDataList& favicon_usage) {
   if (history_service_)
diff --git a/components/favicon/core/favicon_service.h b/components/favicon/core/favicon_service.h
index d122e90..e237967 100644
--- a/components/favicon/core/favicon_service.h
+++ b/components/favicon/core/favicon_service.h
@@ -171,13 +171,6 @@ class FaviconService : public KeyedService {
   // Marks all types of favicon for the page as being out of date.
   void SetFaviconOutOfDateForPage(const GURL& page_url);
 
-  // Clones all icons from an existing page. This associates the icons from
-  // |old_page_url| with |new_page_url|, provided |new_page_url| has no
-  // recorded associations to any other icons.
-  // Needed if you want to declare favicons (tentatively) in advance, before a
-  // page is ever visited.
-  void CloneFavicon(const GURL& old_page_url, const GURL& new_page_url);
-
   // Allows the importer to set many favicons for many pages at once. The pages
   // must exist, any favicon sets for unknown pages will be discarded. Existing
   // favicons will not be overwritten.