[MD Extensions] Add support for URL navigation

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 a7a3ab730708f89391d78ff5556069672556aea5..d912add56bee9d9ab76c3138eaa41f9414abc468 100644
--- a/chrome/test/data/webui/extensions/cr_extensions_browsertest.js
+++ b/chrome/test/data/webui/extensions/cr_extensions_browsertest.js
@@ -46,6 +46,7 @@ CrExtensionsBrowserTest.prototype = {
     'extension_keyboard_shortcuts_test.js',
     'extension_options_dialog_test.js',
     'extension_pack_dialog_test.js',
+    'extension_page_state_test.js',
     'extension_service_test.js',
     'extension_shortcut_input_test.js',
     'extension_sidebar_test.js',
@@ -341,3 +342,37 @@ TEST_F('CrExtensionsBrowserTest', 'ExtensionCodeSectionLayoutTest',
   extension_code_section_tests.registerTests();
   mocha.grep(assert(extension_code_section_tests.TestNames.Layout)).run();
 });
+
+////////////////////////////////////////////////////////////////////////////////
+// Extension Page State Tests
+
+function CrExtensionsPageStateBrowserTest() {}
+
+// extensions.PageState observes window.location. In order to test this without
+// the "real" PageState joining the party, we navigate to page_state.html
+// directly.
+CrExtensionsPageStateBrowserTest.prototype = {
+  __proto__: CrExtensionsBrowserTest.prototype,
+
+  /** @override */
+  browsePreload: 'chrome://extensions/page_state.html',
+};
+
+TEST_F('CrExtensionsPageStateBrowserTest', 'ExtensionPageStateBasicTest',
+       function() {
+  extension_page_state_tests.registerTests();
+  mocha.grep(assert(extension_page_state_tests.TestNames.Basic)).run();
+});
+
+TEST_F('CrExtensionsPageStateBrowserTest', 'ExtensionPageStateConversionTest',
+       function() {
+  extension_page_state_tests.registerTests();
+  mocha.grep(assert(extension_page_state_tests.TestNames.Conversions)).run();
+});
+
+TEST_F('CrExtensionsPageStateBrowserTest',
+       'ExtensionPageStatePushAndReplaceStateTest', function() {
+  extension_page_state_tests.registerTests();
+  mocha.grep(
+      assert(extension_page_state_tests.TestNames.PushAndReplaceState)).run();
+});