[content shell] add support for a testRunner.setXSSAuditorEnabled

content/shell/webkit_test_runner_host.cc

Index: content/shell/webkit_test_runner_host.cc
diff --git a/content/shell/webkit_test_runner_host.cc b/content/shell/webkit_test_runner_host.cc
index f8e45e57d0b8fb2084b659f437d89fff42ca9b3a..5eef32d785f7a63b2f0b5978633f4abde0a93ae7 100644
--- a/content/shell/webkit_test_runner_host.cc
+++ b/content/shell/webkit_test_runner_host.cc
@@ -180,6 +180,7 @@ bool WebKitTestController::ResetAfterLayoutTest() {
   is_printing_ = false;
   should_stay_on_page_after_handling_before_unload_ = false;
   wait_until_done_ = false;
+  prefs_ = ShellWebPreferences();
   watchdog_.Cancel();
   if (main_window_) {
     Observe(NULL);
@@ -231,6 +232,8 @@ bool WebKitTestController::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(ShellViewHostMsg_PrintMessage, OnPrintMessage)
     IPC_MESSAGE_HANDLER(ShellViewHostMsg_TextDump, OnTextDump)
     IPC_MESSAGE_HANDLER(ShellViewHostMsg_ImageDump, OnImageDump)
+    IPC_MESSAGE_HANDLER(ShellViewHostMsg_OverridePreferences,
+                        OnOverridePreferences)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
@@ -348,6 +351,11 @@ void WebKitTestController::OnPrintMessage(const std::string& message) {
   printer_->AddMessageRaw(message);
 }
 
+void WebKitTestController::OnOverridePreferences(
+    const ShellWebPreferences& prefs) {
+  prefs_ = prefs;
+}
+
 // WebKitTestRunnerHost -------------------------------------------------------
 
 WebKitTestRunnerHost::WebKitTestRunnerHost(