Add Observer in FaviconTabHelper

chrome/browser/favicon/favicon_tab_helper.cc

Index: chrome/browser/favicon/favicon_tab_helper.cc
diff --git a/chrome/browser/favicon/favicon_tab_helper.cc b/chrome/browser/favicon/favicon_tab_helper.cc
index 3992f8f02aca60b86bc066008245594ad18c5a90..b0ff7566473d995460d92fc555859a59d2d0950e 100644
--- a/chrome/browser/favicon/favicon_tab_helper.cc
+++ b/chrome/browser/favicon/favicon_tab_helper.cc
@@ -136,6 +136,14 @@ void FaviconTabHelper::SaveFavicon() {
       entry->GetURL(), favicon.url, favicon_base::FAVICON, favicon.image);
 }
 
+void FaviconTabHelper::AddObserver(Observer* observer) {
+  observer_list_.AddObserver(observer);
+}
+
+void FaviconTabHelper::RemoveObserver(Observer* observer) {
+  observer_list_.RemoveObserver(observer);
+}
+
 int FaviconTabHelper::StartDownload(const GURL& url, int max_image_size) {
   FaviconService* favicon_service = FaviconServiceFactory::GetForProfile(
       profile_->GetOriginalProfile(), Profile::IMPLICIT_ACCESS);
@@ -195,6 +203,10 @@ void FaviconTabHelper::SetActiveFaviconValidity(bool validity) {
   GetFaviconStatus().valid = validity;
 }
 
+void FaviconTabHelper::OnFaviconAvailable(const gfx::Image& image) {
+  FOR_EACH_OBSERVER(Observer, observer_list_, OnFaviconAvailable(image));
+}
+
 content::FaviconStatus& FaviconTabHelper::GetFaviconStatus() {
   DCHECK(web_contents()->GetController().GetActiveEntry());
   return web_contents()->GetController().GetActiveEntry()->GetFavicon();