arc: Set custom icon in shelf for ARC apps.

chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc

Index: chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc
diff --git a/chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc b/chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc
index 378cbf405716ef43425deba992c4b71eb1782dcf..9c55c9d25604589122f30c9f4f302676517af994 100644
--- a/chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc
+++ b/chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc
@@ -1063,6 +1063,14 @@ void ArcAppListPrefs::OnTaskOrientationLockRequested(
     observer.OnTaskOrientationLockRequested(task_id, orientation_lock);
 }
 
+void ArcAppListPrefs::OnTaskSetDescription(

[msw, 2017/05/18 18:26:47]

ditto nit: order to match interface decl

[khmel, 2017/05/18 20:27:50]

Done.

+    int32_t task_id,
+    const std::string& label,
+    const std::vector<uint8_t>& icon_png_data) {
+  for (auto& observer : observer_list_)
+    observer.OnTaskSetDescription(task_id, label, icon_png_data);
+}
+
 void ArcAppListPrefs::AddApp(const arc::mojom::AppInfo& app_info) {
   if ((app_info.name.empty() || app_info.package_name.empty() ||
        app_info.activity.empty())) {