Cleanup webview app_shell_browsertests and add webview media permission tests in app_shell_browsert…

extensions/browser/guest_view/web_view/web_view_apitest.h

+// Copyright 2014 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 "base/values.h"
+#include "extensions/browser/guest_view/test_guest_view_manager.h"
+#include "extensions/shell/test/shell_test.h"
+
+namespace content {
+class WebContents;
+}  // namespace content
+
+namespace extensions {
+class TestGuestViewManager;
+
+class WebViewAPITest : public AppShellTest {
+ protected:
+  WebViewAPITest();
+
+  void LaunchApp(const std::string& app_location);
+  void RunTest(const std::string& test_name, const std::string& app_location);
+  void StartTestServer();
+  void StopTestServer();
+  TestGuestViewManager* GetGuestViewManager();
+
+  // content::BrowserTestBase implementation
+  virtual void SetUpOnMainThread() override;
+  virtual void TearDownOnMainThread() override;
+
+ protected:
+  content::WebContents* embedder_web_contents_;
+  TestGuestViewManagerFactory factory_;
+  base::DictionaryValue test_config_;
+};
+
+}  // namespace extensions