Revert of Enable Site Isolation for Extensions.

chrome/browser/extensions/extension_apitest.cc

Index: chrome/browser/extensions/extension_apitest.cc
diff --git a/chrome/browser/extensions/extension_apitest.cc b/chrome/browser/extensions/extension_apitest.cc
index 2f14cddaf51e95edf8023fa37c984a0610dc1635..0402aacbd18805ad8fc6a9a0ea053c6b4be31bcd 100644
--- a/chrome/browser/extensions/extension_apitest.cc
+++ b/chrome/browser/extensions/extension_apitest.cc
@@ -156,7 +156,10 @@
   test_config_->SetString(kTestDataDirectory,
                           net::FilePathToFileURL(test_data_dir_).spec());
   test_config_->SetInteger(kTestWebSocketPort, 0);
-  bool isolate_extensions = true;
+  bool isolate_extensions = base::CommandLine::ForCurrentProcess()->HasSwitch(
+                                switches::kSitePerProcess) ||
+                            base::CommandLine::ForCurrentProcess()->HasSwitch(
+                                extensions::switches::kIsolateExtensions);
   test_config_->SetBoolean(kIsolateExtensions, isolate_extensions);
   extensions::TestGetConfigFunction::set_test_config_state(
       test_config_.get());