Start showing basic infobars for manifest apps

chrome/browser/android/banners/app_banner_infobar_delegate.cc

+// Copyright 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 "chrome/browser/android/banners/app_banner_infobar_delegate.h"
+
+#include "base/strings/string16.h"
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/infobars/infobar_service.h"
+#include "chrome/grit/generated_resources.h"
+#include "components/infobars/core/infobar.h"
+#include "ui/base/l10n/l10n_util.h"
+
+namespace banners {
+
+infobars::InfoBar* AppBannerInfoBarDelegate::CreateForWebApp(
+    InfoBarService* infobar_service,
+    const AppDelegate* helper,
+    const base::string16& app_name,
+    const GURL& url) {
+  AppBannerInfoBarDelegate* const delegate = new AppBannerInfoBarDelegate(
+      helper,
+      app_name,
+      url);
+
+  return infobar_service->AddInfoBar(infobar_service->CreateConfirmInfoBar(
+      scoped_ptr<ConfirmInfoBarDelegate>(delegate)));
+}
+
+AppBannerInfoBarDelegate::AppBannerInfoBarDelegate(
+    const AppDelegate* helper,
+    const base::string16& app_title,
+    const GURL& url)
+    : delegate_(helper),
+      app_title_(app_title),
+      url_(url),
+      button_text_(l10n_util::GetStringUTF16(
+          IDS_APP_INSTALL_ALERTS_ADD_TO_HOMESCREEN)) {
+}
+
+AppBannerInfoBarDelegate::~AppBannerInfoBarDelegate() {
+}
+
+base::string16 AppBannerInfoBarDelegate::GetMessageText() const {
+  return app_title_;
+}
+
+int AppBannerInfoBarDelegate::GetButtons() const {
+  return BUTTON_OK;
+}
+
+base::string16 AppBannerInfoBarDelegate::GetButtonLabel(InfoBarButton button)
+    const {
+  return button_text_;
+}
+
+gfx::Image AppBannerInfoBarDelegate::GetIcon() const {

[newt (away), 2015/02/03 00:57:24]

How could delegate_ ever be null? It seems impossible, in which case you
shouldn't handle it. You could add a DCHECK in the CreateForWebApp() method
though.

[gone, 2015/02/03 01:18:16]

Done.

+  return delegate_ ? delegate_->GetIcon() : gfx::Image();
+}
+
+void AppBannerInfoBarDelegate::InfoBarDismissed() {
+  if (delegate_)
+    delegate_->Block();
+}
+
+bool AppBannerInfoBarDelegate::Accept() {
+  if (delegate_)
+    delegate_->Install();
+  return true;
+}
+
+}  // namespace banners