Plumb through site-specific quirks setting with a command line switch.

webkit/tools/test_shell/test_shell.cc

Index: webkit/tools/test_shell/test_shell.cc
diff --git a/webkit/tools/test_shell/test_shell.cc b/webkit/tools/test_shell/test_shell.cc
index 30f34a649a2a23be034e9899f116ca75100b6ea7..74113d3d31d5b622a1db19ec2ab9ce9949fb1a33 100644
--- a/webkit/tools/test_shell/test_shell.cc
+++ b/webkit/tools/test_shell/test_shell.cc
@@ -431,6 +431,7 @@ void TestShell::ResetWebPreferences() {
         web_prefs_->javascript_can_open_windows_automatically = true;
         web_prefs_->dom_paste_enabled = true;
         web_prefs_->developer_extras_enabled = !layout_test_mode_;
+        web_prefs_->site_specific_quirks_enabled = true;
         web_prefs_->shrinks_standalone_images_to_fit = false;
         web_prefs_->uses_universal_detector = false;
         web_prefs_->text_areas_are_resizable = false;