[MD Extensions] Implement keyboard shortcuts page

chrome/test/data/webui/extensions/cr_extensions_browsertest.js

Index: chrome/test/data/webui/extensions/cr_extensions_browsertest.js
diff --git a/chrome/test/data/webui/extensions/cr_extensions_browsertest.js b/chrome/test/data/webui/extensions/cr_extensions_browsertest.js
index 458c16439e3d9720d3266534e15b44b139f93435..c9fb7ed612164c6ff212153028ac45f3087c88b5 100644
--- a/chrome/test/data/webui/extensions/cr_extensions_browsertest.js
+++ b/chrome/test/data/webui/extensions/cr_extensions_browsertest.js
@@ -42,6 +42,7 @@ CrExtensionsBrowserTest.prototype = {
     'extension_keyboard_shortcuts_test.js',
     'extension_pack_dialog_test.js',
     'extension_service_test.js',
+    'extension_shortcut_input_test.js',
     'extension_sidebar_test.js',
     'extension_manager_test.js',
     '../mock_controller.js',
@@ -228,6 +229,12 @@ TEST_F('CrExtensionsBrowserTest', 'ExtensionShortcutUtilTest', function() {
       assert(extension_keyboard_shortcut_tests.TestNames.ShortcutUtil)).run();
 });
 
+TEST_F('CrExtensionsBrowserTest', 'ExtensionShortcutInputTest', function() {
+  extension_shortcut_input_tests.registerTests();
+  mocha.grep(
+      assert(extension_shortcut_input_tests.TestNames.Basic)).run();
+});
+
 ////////////////////////////////////////////////////////////////////////////////
 // Extension Pack Dialog Tests