Chrome app manifest support for action handlers.

chrome/browser/chromeos/note_taking_helper.h

Index: chrome/browser/chromeos/note_taking_helper.h
diff --git a/chrome/browser/chromeos/note_taking_helper.h b/chrome/browser/chromeos/note_taking_helper.h
index 441d8c22d943fdc4f6213f7d900a38ffac9b7551..a66b8dc4897a263c0fd2bb798ffc55e5ea6b14b1 100644
--- a/chrome/browser/chromeos/note_taking_helper.h
+++ b/chrome/browser/chromeos/note_taking_helper.h
@@ -80,6 +80,10 @@ class NoteTakingHelper : public arc::ArcServiceManager::Observer,
       std::unique_ptr<extensions::api::app_runtime::ActionData>,
       const base::FilePath&)>;
 
+  // Extension manifest "action" entry value that specifies the app supports the
+  // new note flow.
+  static const char kChromeNewNoteAction[];
+
   // Intent action used to launch Android apps.
   static const char kIntentAction[];