Allow chromedriver to set local state preferences.

chrome/test/webdriver/commands/create_session.cc

Index: chrome/test/webdriver/commands/create_session.cc
diff --git a/chrome/test/webdriver/commands/create_session.cc b/chrome/test/webdriver/commands/create_session.cc
index f78fa382d2a988bedc20bf36c32ffa7c614e6d1f..4f07f3a857c3126822d166eb5b495dcb08dc8935 100644
--- a/chrome/test/webdriver/commands/create_session.cc
+++ b/chrome/test/webdriver/commands/create_session.cc
@@ -57,6 +57,9 @@ void CreateSession::ExecutePost(Response* const response) {
   Session::Options session_options;
   session_options.load_async = caps.load_async;
   session_options.use_native_events = caps.native_events;
+  session_options.no_website_testing_defaults =
+      caps.no_website_testing_defaults;
+  session_options.extensions = caps.extensions;
 
   Automation::BrowserOptions browser_options;
   browser_options.command = caps.command;
@@ -72,15 +75,6 @@ void CreateSession::ExecutePost(Response* const response) {
     return;
   }
 
-  // Install extensions.
-  for (size_t i = 0; i < caps.extensions.size(); ++i) {
-    Error* error = session->InstallExtensionDeprecated(caps.extensions[i]);
-    if (error) {
-      response->SetError(error);
-      return;
-    }
-  }
-
   LOG(INFO) << "Created session " << session->id();
   // Redirect to a relative URI. Although prohibited by the HTTP standard,
   // this is what the IEDriver does. Finding the actual IP address is