Don't update icon of chrome app shortcuts from the favicon of the hosted URL.

chrome/browser/extensions/extension_prefs.cc

Index: chrome/browser/extensions/extension_prefs.cc
diff --git a/chrome/browser/extensions/extension_prefs.cc b/chrome/browser/extensions/extension_prefs.cc
index 4ab239dab1bae41361bc2588dfe37dad16ad04e5..7b5909364c2292fb9104c35cb2ffd578461a7c88 100644
--- a/chrome/browser/extensions/extension_prefs.cc
+++ b/chrome/browser/extensions/extension_prefs.cc
@@ -604,6 +604,11 @@ extension_misc::LaunchContainer ExtensionPrefs::GetLaunchContainer(
   extension_misc::LaunchContainer launch_container =
       extension->launch_container();
 
+  // Apps with app.launch.container = 'panel' should always
+  // open in a panel.
+  if (launch_container == extension_misc::LAUNCH_PANEL)
+    return extension_misc::LAUNCH_PANEL;
+
   ExtensionPrefs::LaunchType prefs_launch_type =
       GetLaunchType(extension->id(), default_pref_value);