Add UI to TestShell to enable/disable images, plugins, and scripts....

webkit/tools/test_shell/test_shell.h

Index: webkit/tools/test_shell/test_shell.h
===================================================================
--- webkit/tools/test_shell/test_shell.h	(revision 37542)
+++ webkit/tools/test_shell/test_shell.h	(working copy)
@@ -110,6 +110,15 @@
     bool is_loading() const { return is_loading_; }
     void set_is_loading(bool is_loading) { is_loading_ = is_loading; }
 
+    bool allow_images() const { return allow_images_; }
+    void set_allow_images(bool allow) { allow_images_ = allow; }
+
+    bool allow_plugins() const { return allow_plugins_; }
+    void set_allow_plugins(bool allow) { allow_plugins_ = allow; }
+
+    bool allow_scripts() const { return allow_scripts_; }
+    void set_allow_scripts(bool allow) { allow_scripts_ = allow; }
+
     void UpdateNavigationControls();
 
     // A new TestShell window will be opened with devtools url.
@@ -391,6 +400,10 @@
     // True if the page is loading.
     bool is_loading_;
 
+    bool allow_images_;
+    bool allow_plugins_;
+    bool allow_scripts_;
+
     // The preferences for the test shell.
     static WebPreferences* web_prefs_;