Add tab status to accessibility labels

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 21c34bebee5fc5843b5a1554f7cea70cd6f25836..ea95ef47c210d64f3f32a5bd3671556c4b54d9bc 100644
--- a/chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc
+++ b/chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc
@@ -34,6 +34,9 @@
 #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"
@@ -54,8 +57,17 @@ namespace {
 
 TabRendererData::NetworkState TabContentsNetworkState(
     WebContents* contents) {
-  if (!contents || !contents->IsLoadingToDifferentDocument())
+  if (!contents)
     return TabRendererData::NETWORK_STATE_NONE;
+
+  if (!contents->IsLoadingToDifferentDocument()) {
+    content::NavigationEntry* entry =
+        contents->GetController().GetLastCommittedEntry();
+    if (entry && (entry->GetPageType() == content::PAGE_TYPE_ERROR))
+      return TabRendererData::NETWORK_STATE_ERROR;
+    return TabRendererData::NETWORK_STATE_NONE;
+  }
+
   if (contents->IsWaitingForResponse())
     return TabRendererData::NETWORK_STATE_WAITING;
   return TabRendererData::NETWORK_STATE_LOADING;