Enable Site Isolation for Extensions.

chrome/common/extensions/extension_process_policy.cc

Index: chrome/common/extensions/extension_process_policy.cc
diff --git a/chrome/common/extensions/extension_process_policy.cc b/chrome/common/extensions/extension_process_policy.cc
index 3208e21d800491a6e3254932c3bef4c765f5bbdd..914427763bfd510328b9217a8b9d0df3e4cdd7e8 100644
--- a/chrome/common/extensions/extension_process_policy.cc
+++ b/chrome/common/extensions/extension_process_policy.cc
@@ -68,16 +68,7 @@ bool CrossesExtensionProcessBoundary(
 }
 
 bool IsIsolateExtensionsEnabled() {
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kIsolateExtensions)) {
-    return true;
-  }
-
-  const std::string group_name =
-      base::FieldTrialList::FindFullName("SiteIsolationExtensions");
-  // Use StartsWith() for more flexibility (e.g. multiple Enabled groups).
-  return base::StartsWith(group_name, "Enabled",
-                          base::CompareCase::INSENSITIVE_ASCII);
+  return true;
 }
 
 }  // namespace extensions