cleanup: Use ExtensionRegistryObserver in Uber

chrome/browser/ui/webui/uber/uber_ui_browsertest.cc

+// Copyright (c) 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <string>
+
+#include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/extensions/test_extension_system.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/common/url_constants.h"
+#include "chrome/test/base/ui_test_utils.h"
+#include "chrome/test/base/web_ui_browser_test.h"
+#include "content/public/test/browser_test_utils.h"
+#include "extensions/browser/extension_registry.h"
+#include "extensions/common/extension.h"
+#include "extensions/common/extension_builder.h"
+
+class UberUIBrowserTest : public WebUIBrowserTest {};
+
+IN_PROC_BROWSER_TEST_F(UberUIBrowserTest, HistoryOverride) {
+  ui_test_utils::NavigateToURL(browser(), GURL(chrome::kChromeUIUberFrameURL));
+  content::WebContents* tab =
+      browser()->tab_strip_model()->GetActiveWebContents();
+
+  // Inject script. This script will be called when Extension is loaded.
+  const std::string inject_script =
+      "var is_called_override = false;"
+      "var uber_frame = {};"
+      "uber_frame.setNavigationOverride = function(controls, override) { "
+      "is_called_override = true; };";
+
+  ASSERT_TRUE(content::ExecuteScript(tab, inject_script));
+
+  scoped_refptr<const extensions::Extension> extension =
+      extensions::ExtensionBuilder()
+          .SetManifest(extensions::DictionaryBuilder()
+                           .Set("name", "History Override")
+                           .Set("version", "1")
+                           .Set("manifest_version", 2)
+                           .Set("permission",
+                                extensions::ListBuilder().Append("history")))
+          .Build();
+
+  ExtensionService* service = extensions::ExtensionSystem::Get(
+                                  browser()->profile())->extension_service();
+  // Load extension. UberUI overrides history navigation.
+  // In this test, injected script will be called instead.
+  service->AddExtension(extension.get());
+
+  bool called_override;
+  EXPECT_TRUE(content::ExecuteScriptAndExtractBool(
+      tab, "domAutomationController.send(is_called_override);",
+      &called_override));
+  EXPECT_TRUE(called_override);
+}