Cleanup: Remove unneeded android extensions code in chrome/browser/ui.

chrome/browser/ui/android/extensions/extension_install_ui_android.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/android/extensions/extension_install_ui_android.h"
-
-#include "base/logging.h"
-
-void ExtensionInstallUIAndroid::OnInstallSuccess(
-    const extensions::Extension* extension,
-    const SkBitmap* icon) {
-  NOTIMPLEMENTED();
-}
-
-void ExtensionInstallUIAndroid::OnInstallFailure(
-    const extensions::CrxInstallerError& error) {
-  NOTIMPLEMENTED();
-}
-
-// static
-ExtensionInstallUI* ExtensionInstallUI::Create(Profile* profile) {
-  NOTIMPLEMENTED();
-  return NULL;
-}
-
-// static
-void ExtensionInstallUI::OpenAppInstalledUI(Profile* profile,
-                                            const std::string& app_id) {
-  NOTIMPLEMENTED();
-}
-
-// static
-ExtensionInstallPrompt* ExtensionInstallUI::CreateInstallPromptWithBrowser(
-    Browser* browser) {
-  NOTIMPLEMENTED();
-  return NULL;
-}
-
-// static
-ExtensionInstallPrompt* ExtensionInstallUI::CreateInstallPromptWithProfile(
-    Profile* profile) {
-  NOTIMPLEMENTED();
-  return NULL;
-}