Redo how AppBannerInfoBars are created and stored

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/android/jni_android.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/ui/android/infobars/app_banner_infobar.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/infobars/core/infobar.h"
 #include "components/infobars/core/infobar_manager.h"
-#include "ui/base/l10n/l10n_util.h"
 
 namespace banners {
 
-infobars::InfoBar* AppBannerInfoBarDelegate::CreateForWebApp(
+// static
+AppBannerInfoBar* AppBannerInfoBarDelegate::CreateForWebApp(
     infobars::InfoBarManager* infobar_manager,
-    const AppDelegate* app_delegate,
-    const base::string16& app_name,
+    AppDelegate* app_delegate,
     const GURL& url) {
   scoped_ptr<AppBannerInfoBarDelegate> delegate(new AppBannerInfoBarDelegate(
-      app_delegate,
-      app_name,
-      url));
-
-  return infobar_manager->AddInfoBar(
-      make_scoped_ptr(new AppBannerInfoBar(delegate.Pass(), url)));
+      app_delegate));
+  AppBannerInfoBar* infobar = new AppBannerInfoBar(delegate.Pass(), url);
+  return infobar_manager->AddInfoBar(make_scoped_ptr(infobar))
+      ? infobar : nullptr;
 }
 
-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(AppDelegate* app_delegate)
+    : delegate_(app_delegate) {
 }
 
 AppBannerInfoBarDelegate::~AppBannerInfoBarDelegate() {
+  DCHECK(delegate_);
+  delegate_->OnInfoBarDestroyed();
 }
 
 base::string16 AppBannerInfoBarDelegate::GetMessageText() const {
-  return app_title_;
+  DCHECK(delegate_);
+  return delegate_->GetTitle();
 }
 
 int AppBannerInfoBarDelegate::GetButtons() const {
   return BUTTON_OK;
 }
 
-base::string16 AppBannerInfoBarDelegate::GetButtonLabel(InfoBarButton button)
-    const {
-  return button_text_;
-}
-
 gfx::Image AppBannerInfoBarDelegate::GetIcon() const {
   DCHECK(delegate_);
   return delegate_->GetIcon();
 }
 
 void AppBannerInfoBarDelegate::InfoBarDismissed() {
   DCHECK(delegate_);
   delegate_->Block();
 }
 
 bool AppBannerInfoBarDelegate::Accept() {
   DCHECK(delegate_);
-  delegate_->Install();
-  return true;
+  return delegate_->OnButtonClicked();
 }
 
 }  // namespace banners