AutoDiscardable property support on Chrome Extensions Tabs API.

chrome/browser/extensions/extension_tab_util.cc

Index: chrome/browser/extensions/extension_tab_util.cc
diff --git a/chrome/browser/extensions/extension_tab_util.cc b/chrome/browser/extensions/extension_tab_util.cc
index 74ab6e9885ff50bcd3da33e47b78c27ff06963a9..cfd503cbec708da7c81caaf0fe28e9b84fe64214 100644
--- a/chrome/browser/extensions/extension_tab_util.cc
+++ b/chrome/browser/extensions/extension_tab_util.cc
@@ -389,10 +389,10 @@ std::unique_ptr<api::tabs::Tab> ExtensionTabUtil::CreateTabObject(
   tab_object->highlighted = tab_strip && tab_strip->IsTabSelected(tab_index);
   tab_object->pinned = tab_strip && tab_strip->IsTabPinned(tab_index);
   tab_object->audible.reset(new bool(contents->WasRecentlyAudible()));
-
-  memory::TabManager* tab_manager = g_browser_process->GetTabManager();
-  tab_object->discarded = tab_manager && tab_manager->IsTabDiscarded(contents);
-
+  tab_object->discarded =
+      g_browser_process->GetTabManager()->IsTabDiscarded(contents);
+  tab_object->auto_discardable =
+      g_browser_process->GetTabManager()->IsTabAutoDiscardable(contents);
   tab_object->muted_info = CreateMutedInfo(contents);
   tab_object->incognito = contents->GetBrowserContext()->IsOffTheRecord();
   tab_object->width.reset(