Add webapp homescreen shortcut when WebAPK install fails

chrome/browser/android/banners/app_banner_infobar_delegate_android.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_ANDROID_H_
 #define CHROME_BROWSER_ANDROID_BANNERS_APP_BANNER_INFOBAR_DELEGATE_ANDROID_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 109 matching lines @@
   // already installed, opens it; otherwise, installs it. Returns whether the
   // infobar should be closed as a result of the button press.
   bool AcceptWebApk(content::WebContents* web_contents);
 
   // Returns false if this delegate is for a WebAPK and was triggered from the
   // A2HS menu item. Otherwise returns true.
   bool TriggeredFromBanner() const;
   void SendBannerAccepted();
   void OnWebApkInstallFinished(bool success,
                                const std::string& webapk_package_name);
+
+  // Called when a WebAPK install fails.
+  void OnWebApkInstallFailed();
+
   void TrackWebApkInstallationDismissEvents(InstallState install_state);
 
   // ConfirmInfoBarDelegate:
   infobars::InfoBarDelegate::InfoBarIdentifier GetIdentifier() const override;
   gfx::Image GetIcon() const override;
   void InfoBarDismissed() override;
   base::string16 GetMessageText() const override;
   int GetButtons() const override;
   bool LinkClicked(WindowOpenDisposition disposition) override;
 
@@ skipping 31 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(AppBannerInfoBarDelegateAndroid);
 };
 
 // Register native methods.
 bool RegisterAppBannerInfoBarDelegateAndroid(JNIEnv* env);
 
 }  // namespace banners
 
 #endif  // CHROME_BROWSER_ANDROID_BANNERS_APP_BANNER_INFOBAR_DELEGATE_ANDROID_H_