GuestViews should be able to specify task manager entries

extensions/browser/guest_view/app_view/app_view_guest.cc

Index: extensions/browser/guest_view/app_view/app_view_guest.cc
diff --git a/extensions/browser/guest_view/app_view/app_view_guest.cc b/extensions/browser/guest_view/app_view/app_view_guest.cc
index 9b82badfe1508ed2d3819d1a650d5e013db5ffe5..672315c7bce9c2916856e4cd3776a6dee8aafb36 100644
--- a/extensions/browser/guest_view/app_view/app_view_guest.cc
+++ b/extensions/browser/guest_view/app_view/app_view_guest.cc
@@ -102,7 +102,7 @@ AppViewGuest::AppViewGuest(content::BrowserContext* browser_context,
                            int guest_instance_id)
     : GuestView<AppViewGuest>(browser_context, guest_instance_id),
       app_view_guest_delegate_(
-          ExtensionsAPIClient::Get()->CreateAppViewGuestDelegate()),
+          ExtensionsAPIClient::Get()->CreateAppViewGuestDelegate(this)),
       weak_ptr_factory_(this) {
 }
 
@@ -134,10 +134,16 @@ bool AppViewGuest::HandleContextMenu(const content::ContextMenuParams& params) {
   return false;
 }
 
-const char* AppViewGuest::GetAPINamespace() {
+const char* AppViewGuest::GetAPINamespace() const {
   return appview::kEmbedderAPINamespace;
 }
 
+base::string16 AppViewGuest::GetTaskName() const {
+  if (!app_view_guest_delegate_)
+    return base::string16();
+  return app_view_guest_delegate_->GetTaskName();
+}
+
 void AppViewGuest::CreateWebContents(
     const std::string& embedder_extension_id,
     int embedder_render_process_id,