Allow settings dialog to be opened via the app launcher, as a packaged app.

chrome/browser/tab_contents/render_view_context_menu.cc

Index: chrome/browser/tab_contents/render_view_context_menu.cc
diff --git a/chrome/browser/tab_contents/render_view_context_menu.cc b/chrome/browser/tab_contents/render_view_context_menu.cc
index 1cff6df1aeec448330f4d791cb3e9a28d9f456ef..d4c8b15fb41833fc5d051d86a3bb6231eb394258 100644
--- a/chrome/browser/tab_contents/render_view_context_menu.cc
+++ b/chrome/browser/tab_contents/render_view_context_menu.cc
@@ -501,7 +501,11 @@ const Extension* RenderViewContextMenu::GetExtension() const {
 
 void RenderViewContextMenu::AppendPlatformAppItems() {
   const Extension* platform_app = GetExtension();
-  DCHECK(platform_app);
+
+  // The RVH might be for a process sandboxed from the extension.
+  if (!platform_app)
+    return;
+
   DCHECK(platform_app->is_platform_app());
 
   bool has_selection = !params_.selection_text.empty();