[Favicon] Add new fallback icon rendering flow.

chrome/browser/ui/webui/history_ui.cc

Index: chrome/browser/ui/webui/history_ui.cc
diff --git a/chrome/browser/ui/webui/history_ui.cc b/chrome/browser/ui/webui/history_ui.cc
index c234deca006c0af7273a4bdb226dfd306dedb828..4224a288fc6cae06081d26e24f56c8c2f66f6aef 100644
--- a/chrome/browser/ui/webui/history_ui.cc
+++ b/chrome/browser/ui/webui/history_ui.cc
@@ -32,6 +32,7 @@
 #include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/chrome_pages.h"
+#include "chrome/browser/ui/webui/fallback_icon_source.h"
 #include "chrome/browser/ui/webui/favicon_source.h"
 #include "chrome/browser/ui/webui/metrics_handler.h"
 #include "chrome/common/chrome_switches.h"
@@ -428,6 +429,7 @@ BrowsingHistoryHandler::~BrowsingHistoryHandler() {
 void BrowsingHistoryHandler::RegisterMessages() {
   // Create our favicon data source.
   Profile* profile = Profile::FromWebUI(web_ui());
+  content::URLDataSource::Add(profile, new FallbackIconSource());

[pkotwicz, 2015/01/21 19:44:15]

Remove this. The history page does not use fallback icons (and when it does, it
will make use of the implicit path)

[huangs, 2015/01/22 01:13:27]

Done.

   content::URLDataSource::Add(
       profile, new FaviconSource(profile, FaviconSource::ANY));