Add a confirmation prompt to app uninstallation on the ntp.

chrome/browser/dom_ui/app_launcher_handler.cc

 // Copyright (c) 2010 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/dom_ui/app_launcher_handler.h"
 
 #include "app/animation.h"
 #include "base/string_number_conversions.h"
+#include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/app_launched_animation.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/browser_list.h"
 #include "chrome/browser/extensions/extensions_service.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension.h"
@@ skipping 171 matching lines @@
 #if defined(OS_WIN)
     AppLaunchedAnimation::Show(extension, rect);
 #else
     NOTIMPLEMENTED();
 #endif
   }
 }
 
 void AppLauncherHandler::HandleUninstallApp(const ListValue* args) {
   std::string extension_id = WideToUTF8(ExtractStringValue(args));
+  Extension* extension = extensions_service_->GetExtensionById(
+      extension_id, false);
+  if (!extension)
+    return;
 
-  // Make sure that the extension exists.
+  if (!extension_id_prompting_.empty())
+    return;  // Only one prompt at a time.
+
+  extension_id_prompting_ = extension_id;
+  GetExtensionInstallUI()->ConfirmUninstall(this, extension);
+}
+
+ExtensionInstallUI* AppLauncherHandler::GetExtensionInstallUI() {
+  if (!install_ui_.get())
+    install_ui_.reset(new ExtensionInstallUI(dom_ui_->GetProfile()));
+  return install_ui_.get();
+}
+
+void AppLauncherHandler::InstallUIProceed(bool create_app_shortcut) {
+  // We only ever use ExtensionInstallUI for uninstalling, which should never
+  // result in it telling us to create a shortcut.
+  DCHECK(!create_app_shortcut);
+  DCHECK(!extension_id_prompting_.empty());
+
+  // The extension can be uninstalled in another window while the UI was
+  // showing. Do nothing in that case.
   Extension* extension =
-      extensions_service_->GetExtensionById(extension_id, false);
-  DCHECK(extension);
+      extensions_service_->GetExtensionById(extension_id_prompting_, true);
+  if (!extension)
+    return;
 
-  extensions_service_->UninstallExtension(extension_id, false);
+  extensions_service_->UninstallExtension(extension_id_prompting_,
+                                          false /* external_uninstall */);
+  extension_id_prompting_ = "";
 }
+
+void AppLauncherHandler::InstallUIAbort() {
+  extension_id_prompting_ = "";
+}