Trigger app banner when add to homescreen is pressed and WebAPKs are enabled.

chrome/browser/android/webapps/add_to_homescreen_manager.h

Index: chrome/browser/android/webapps/add_to_homescreen_manager.h
diff --git a/chrome/browser/android/webapps/add_to_homescreen_manager.h b/chrome/browser/android/webapps/add_to_homescreen_manager.h
index 39953335ee1b711fd696ade143ce58d8a6bf0f3f..34c120b88fa6de9cc8be587f4f4d657f65612221 100644
--- a/chrome/browser/android/webapps/add_to_homescreen_manager.h
+++ b/chrome/browser/android/webapps/add_to_homescreen_manager.h
@@ -74,6 +74,10 @@ class AddToHomescreenManager : public AddToHomescreenDataFetcher::Observer {
   // data needed to add the shortcut.
   void AddShortcut(const ShortcutInfo& info, const SkBitmap& icon);
 
+  // Called only when the AddToHomescreenDataFetcher has retrieved all of the
+  // data needed to install a WebAPK.
+  void CreateInfobar(const ShortcutInfo& info, const SkBitmap& icon);

[gone, 2016/08/31 18:12:46]

CreateInfoBarForWebAPK()

[Xi Han, 2016/08/31 20:11:48]

Done.

+
   void RecordAddToHomescreen();
 
   // AddToHomescreenDataFetcher::Observer:
@@ -90,6 +94,9 @@ class AddToHomescreenManager : public AddToHomescreenDataFetcher::Observer {
   // in progress.
   bool add_shortcut_pending_;
 
+  // Whether the site is WebAPK-compatible.
+  bool is_compatible_;

[gone, 2016/08/31 18:12:45]

make the variable name explicitly is_webapk_compatible_.  can't understand what
it's compatible with if you're just looking at the code.

[Xi Han, 2016/08/31 20:11:48]

Done.

+
   // Fetches data required to add a shortcut.
   scoped_refptr<AddToHomescreenDataFetcher> data_fetcher_;