Desaturate the favicon shown in the tab when a network error is encountered

chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc

Index: chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc
diff --git a/chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc b/chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc
index 0d00ebef770f6e86e76929d267ec50325d3e5155..0388a8bca664354574efae0bcc7f518c2cf2258e 100644
--- a/chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc
+++ b/chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc
@@ -35,6 +35,9 @@
 #include "components/omnibox/browser/autocomplete_match.h"
 #include "components/prefs/pref_service.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/navigation_controller.h"
+#include "content/public/browser/navigation_entry.h"
+#include "content/public/browser/navigation_handle.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/plugin_service.h"
 #include "content/public/browser/user_metrics.h"
@@ -506,6 +509,11 @@ void BrowserTabStripController::SetTabRendererDataFromModel(
   data->blocked = model_->IsTabBlocked(model_index);
   data->app = extensions::TabHelper::FromWebContents(contents)->is_app();
   data->alert_state = chrome::GetTabAlertStateForContents(contents);
+
+  content::NavigationEntry* entry =
+      contents->GetController().GetLastCommittedEntry();
+  data->network_error =
+      entry && (entry->GetPageType() == content::PAGE_TYPE_ERROR);
 }
 
 void BrowserTabStripController::SetTabDataAt(content::WebContents* web_contents,