Start showing basic infobars for manifest apps

chrome/browser/android/banners/app_banner_infobar_delegate.h

+// 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.
+
+#ifndef CHROME_BROWSER_ANDROID_BANNERS_APP_BANNER_INFOBAR_DELEGATE_H_
+#define CHROME_BROWSER_ANDROID_BANNERS_APP_BANNER_INFOBAR_DELEGATE_H_
+
+#include "base/strings/string16.h"
+#include "components/infobars/core/confirm_infobar_delegate.h"
+#include "ui/gfx/image/image.h"
+#include "url/gurl.h"
+
+class InfoBarService;
+
+namespace banners {
+
+// Displays information about an app being promoted by a webpage.
+class AppBannerInfoBarDelegate : public ConfirmInfoBarDelegate {
+ public:
+  // Handles calls dealing with blocking, promoting, or grab info about an app.

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

s/grab/grabbing

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

Done.

+  class AppDelegate {
+   public:
+    // User has elected to block the banner from being displayed.
+    virtual void Block() const = 0;
+
+    // User has requested that the app be installed.
+    virtual void Install() const = 0;
+
+    // Icon to display for the app.
+    virtual gfx::Image GetIcon() const = 0;
+  };
+
+  // Creates a banner for the current page.
+  static infobars::InfoBar* CreateForWebApp(InfoBarService* infobar_service,
+                                            const AppDelegate* helper,

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

s/helper/delegate ?

Also, document the return value. It surprised me later on to discover that this
could return null.

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

Done.

+                                            const base::string16& app_title,
+                                            const GURL& url);
+
+  // Changes the label of the button.
+  void SetButtonLabel(const std::string& button_text);
+
+  // InfoBarDelegate overrides.
+  virtual gfx::Image GetIcon() const override;

[newt (away), 2015/02/03 00:57:25]

New style guide: don't use virtual with override. Just use override (which
implies virtual).

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

Done.

+  virtual void InfoBarDismissed() override;
+
+  // ConfirmInfoBarDelegate overrides.
+  virtual base::string16 GetMessageText() const override;
+  virtual int GetButtons() const override;
+  virtual base::string16 GetButtonLabel(InfoBarButton button) const override;
+  virtual bool Accept() override;
+
+ private:
+  // Constructor for a banner for web apps.
+  AppBannerInfoBarDelegate(const AppDelegate* helper,
+                           const base::string16& app_title,
+                           const GURL& url);
+
+  ~AppBannerInfoBarDelegate() override;
+
+  const AppDelegate* delegate_;
+  base::string16 app_title_;
+  GURL url_;
+  base::string16 button_text_;
+
+  DISALLOW_COPY_AND_ASSIGN(AppBannerInfoBarDelegate);
+};  // AppBannerInfoBarDelegate
+
+}  // namespace banners
+
+#endif  // CHROME_BROWSER_ANDROID_BANNERS_APP_BANNER_INFOBAR_DELEGATE_H_