Make AppBannerInfoBar install WebAPK.

chrome/browser/android/banners/app_banner_infobar_delegate_android.h

Index: chrome/browser/android/banners/app_banner_infobar_delegate_android.h
diff --git a/chrome/browser/android/banners/app_banner_infobar_delegate_android.h b/chrome/browser/android/banners/app_banner_infobar_delegate_android.h
index f678fb52c71d49d46ffd3a5d68d22d57a45bafaf..13b84f1a9472909aef1c78a1a049101b92ae2dcc 100644
--- a/chrome/browser/android/banners/app_banner_infobar_delegate_android.h
+++ b/chrome/browser/android/banners/app_banner_infobar_delegate_android.h
@@ -38,7 +38,8 @@ class AppBannerInfoBarDelegateAndroid : public ConfirmInfoBarDelegate {
       const content::Manifest& manifest,
       const GURL& icon_url,
       std::unique_ptr<SkBitmap> icon,
-      int event_request_id);
+      int event_request_id,
+      bool is_webapk);
 
   // Delegate for promoting an Android app.
   AppBannerInfoBarDelegateAndroid(
@@ -68,8 +69,13 @@ class AppBannerInfoBarDelegateAndroid : public ConfirmInfoBarDelegate {
 
  private:
   void CreateJavaDelegate();
+  bool AcceptNativeApp(content::WebContents* web_contents);
+  bool AcceptWebApp(content::WebContents* web_contents);
+  bool AcceptWebApk(content::WebContents* web_contents);
   void SendBannerAccepted(content::WebContents* web_contents,
                           const std::string& platform);
+  void OnWebApkInstallFinished(bool success, const std::string& webapk_package);
+  void RemoveInfoBarOnUIThread();
 
   // ConfirmInfoBarDelegate:
   infobars::InfoBarDelegate::InfoBarIdentifier GetIdentifier() const override;
@@ -99,6 +105,9 @@ class AppBannerInfoBarDelegateAndroid : public ConfirmInfoBarDelegate {
   int event_request_id_;
   bool has_user_interaction_;
 
+  std::string webapk_package_name_;
+  bool is_webapk_;
+
   DISALLOW_COPY_AND_ASSIGN(AppBannerInfoBarDelegateAndroid);
 };  // AppBannerInfoBarDelegateAndroid