[Extensions Page MD] Stub out a materialized extensions page

chrome/browser/ui/webui/extensions/extensions_ui.cc

 // Copyright (c) 2012 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 "chrome/browser/ui/webui/extensions/extensions_ui.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/webui/extensions/extension_loader_handler.h"
 #include "chrome/browser/ui/webui/extensions/extension_settings_handler.h"
 #include "chrome/browser/ui/webui/extensions/install_extension_handler.h"
 #include "chrome/browser/ui/webui/metrics_handler.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/common/url_constants.h"
+#include "chrome/grit/generated_resources.h"
 #include "content/public/browser/web_ui.h"
 #include "content/public/browser/web_ui_data_source.h"
 #include "grit/browser_resources.h"
 #include "grit/theme_resources.h"
 #include "ui/base/resource/resource_bundle.h"
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/ownership/owner_settings_service_chromeos_factory.h"
 #include "chrome/browser/ui/webui/extensions/chromeos/kiosk_apps_handler.h"
 #endif
 
 namespace extensions {
 
 namespace {
 
+content::WebUIDataSource* CreateMdExtensionsSource() {
+  content::WebUIDataSource* source =
+      content::WebUIDataSource::Create(chrome::kChromeUIExtensionsHost);
+
+  source->SetJsonPath("strings.js");
+  source->AddLocalizedString("title",
+                             IDS_MANAGE_EXTENSIONS_SETTING_WINDOWS_TITLE);
+  source->AddResourcePath("manager.html", IDR_MD_EXTENSIONS_MANAGER_HTML);
+  source->AddResourcePath("manager.js", IDR_MD_EXTENSIONS_MANAGER_JS);
+  source->AddResourcePath("strings.html", IDR_MD_EXTENSIONS_STRINGS_HTML);
+  source->SetDefaultResource(IDR_MD_EXTENSIONS_EXTENSIONS_HTML);
+
+  return source;
+}
+
 content::WebUIDataSource* CreateExtensionsHTMLSource() {
   content::WebUIDataSource* source =
       content::WebUIDataSource::Create(chrome::kChromeUIExtensionsFrameHost);
 
   source->SetJsonPath("strings.js");
   source->AddResourcePath("extensions.js", IDR_EXTENSIONS_JS);
   source->AddResourcePath("extension_command_list.js",
                           IDR_EXTENSION_COMMAND_LIST_JS);
   source->AddResourcePath("extension_list.js", IDR_EXTENSION_LIST_JS);
   source->SetDefaultResource(IDR_EXTENSIONS_HTML);
   source->DisableDenyXFrameOptions();
   return source;
 }
 
 }  // namespace
 
 ExtensionsUI::ExtensionsUI(content::WebUI* web_ui) : WebUIController(web_ui) {
   Profile* profile = Profile::FromWebUI(web_ui);
-  content::WebUIDataSource* source = CreateExtensionsHTMLSource();
+  content::WebUIDataSource* source = nullptr;
 
-  ExtensionSettingsHandler* handler = new ExtensionSettingsHandler();
-  handler->GetLocalizedValues(source);
-  web_ui->AddMessageHandler(handler);
+  if (::switches::MdExtensionsEnabled()) {
+    source = CreateMdExtensionsSource();
+  } else {
+    source = CreateExtensionsHTMLSource();
 
-  ExtensionLoaderHandler* extension_loader_handler =
-      new ExtensionLoaderHandler(profile);
-  extension_loader_handler->GetLocalizedValues(source);
-  web_ui->AddMessageHandler(extension_loader_handler);
+    ExtensionSettingsHandler* handler = new ExtensionSettingsHandler();
+    handler->GetLocalizedValues(source);
+    web_ui->AddMessageHandler(handler);
 
-  InstallExtensionHandler* install_extension_handler =
-      new InstallExtensionHandler();
-  install_extension_handler->GetLocalizedValues(source);
-  web_ui->AddMessageHandler(install_extension_handler);
+    ExtensionLoaderHandler* extension_loader_handler =
+        new ExtensionLoaderHandler(profile);
+    extension_loader_handler->GetLocalizedValues(source);
+    web_ui->AddMessageHandler(extension_loader_handler);
+
+    InstallExtensionHandler* install_extension_handler =
+        new InstallExtensionHandler();
+    install_extension_handler->GetLocalizedValues(source);
+    web_ui->AddMessageHandler(install_extension_handler);
 
 #if defined(OS_CHROMEOS)
-  chromeos::KioskAppsHandler* kiosk_app_handler =
-      new chromeos::KioskAppsHandler(
-          chromeos::OwnerSettingsServiceChromeOSFactory::GetForBrowserContext(
-              profile));
-  kiosk_app_handler->GetLocalizedValues(source);
-  web_ui->AddMessageHandler(kiosk_app_handler);
+    chromeos::KioskAppsHandler* kiosk_app_handler =
+        new chromeos::KioskAppsHandler(
+            chromeos::OwnerSettingsServiceChromeOSFactory::GetForBrowserContext(
+                profile));
+    kiosk_app_handler->GetLocalizedValues(source);
+    web_ui->AddMessageHandler(kiosk_app_handler);
 #endif
 
-  web_ui->AddMessageHandler(new MetricsHandler());
+    web_ui->AddMessageHandler(new MetricsHandler());
 
-  // Need to allow <object> elements so that the <extensionoptions> browser
-  // plugin can be loaded within chrome://extensions.
-  source->OverrideContentSecurityPolicyObjectSrc("object-src 'self';");
+    // Need to allow <object> elements so that the <extensionoptions> browser
+    // plugin can be loaded within chrome://extensions.
+    source->OverrideContentSecurityPolicyObjectSrc("object-src 'self';");
+  }
 
   content::WebUIDataSource::Add(profile, source);
 }
 
 ExtensionsUI::~ExtensionsUI() {}
 
 // static
 base::RefCountedMemory* ExtensionsUI::GetFaviconResourceBytes(
     ui::ScaleFactor scale_factor) {
   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
   return rb.LoadDataResourceBytesForScale(IDR_EXTENSIONS_FAVICON, scale_factor);
 }
 
 }  // namespace extensions