Use Web Manifest when creating a shortcut on Chrome Android.

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 04ef1bad004e0b3d030e89c002be712968d6205a..6b7d56c963947c7bd4812b1474f1057cdc3aaede 100644
--- a/chrome/browser/android/shortcut_helper.h
+++ b/chrome/browser/android/shortcut_helper.h
@@ -16,6 +16,7 @@
 
 namespace content {
 class WebContents;
+struct Manifest;
 }  // namespace content
 
 namespace IPC {
@@ -47,6 +48,9 @@ class ShortcutHelper : public content::WebContentsObserver {
   // IPC message received when the initialization is finished.
   void OnDidGetWebApplicationInfo(const WebApplicationInfo& web_app_info);
 
+  // Callback run when the Manifest is ready to be used.
+  void OnDidGetManifest(const content::Manifest& manifest);
+
   // Adds a shortcut to the current URL to the Android home screen.
   void AddShortcut(JNIEnv* env,
                    jobject obj,