Make AppBannerInfoBar install WebAPK.

chrome/browser/android/shortcut_helper.h

Index: chrome/browser/android/shortcut_helper.h
diff --git a/chrome/browser/android/shortcut_helper.h b/chrome/browser/android/shortcut_helper.h
index a9c4b88851d25ac85752a6a7e292d7f38585c981..813579834f3a0a47076cd46a60a03cd83b8afb1c 100644
--- a/chrome/browser/android/shortcut_helper.h
+++ b/chrome/browser/android/shortcut_helper.h
@@ -21,6 +21,10 @@ class WebContents;
 // ShortcutHelper in Java.
 class ShortcutHelper {
  public:
+  // Called when the package name of the WebAPK to install is available.
+  using WebApkPackageNameAvailableCallback = base::Callback<void(
+      const std::string& webapk_package)>;
+
   // Registers JNI hooks.
   static bool RegisterShortcutHelper(JNIEnv* env);
 
@@ -39,7 +43,8 @@ class ShortcutHelper {
   static void InstallWebApkWithSkBitmap(
       content::BrowserContext* browser_context,
       const ShortcutInfo& info,
-      const SkBitmap& icon_bitmap);
+      const SkBitmap& icon_bitmap,
+      const WebApkPackageNameAvailableCallback& callback);
 
   // Adds a shortcut which opens in a fullscreen window to the launcher.
   // |splash_image_callback| will be invoked once the Java-side operation has