Moved IS_EPHEMERAL flag to extension prefs

chrome/test/data/extensions/app_list/Preferences

Index: chrome/test/data/extensions/app_list/Preferences
diff --git a/chrome/test/data/extensions/app_list/Preferences b/chrome/test/data/extensions/app_list/Preferences
index bb1de10974c0bb68d91d4a73317b8c87143ad156..5137d81a58acfb38e674c9aff2cec6118d765864 100644
--- a/chrome/test/data/extensions/app_list/Preferences
+++ b/chrome/test/data/extensions/app_list/Preferences
@@ -66,6 +66,25 @@
                 }
               }
             }
+         },
+         "ebgmjfhpkngekpdlgfdbolkhfmofdfdf": {
+            "location": 1,
+            "path": "ebgmjfhpkngekpdlgfdbolkhfmofdfdf/1.0",
+            "app_launcher_ordinal": "t",
+            "page_ordinal": "n",
+            "state": 1,
+            "install_time": "12968795380420751",
+            "ephemeral_app": true,
+            "manifest": {
+              "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtd5jeTaSP38on5y28W8f5MV+F4mvYMx0kOJXp8M+EteL9x5TS3et5a7W1jnduIdGtH0Xc5WKhvUnN2nUmEqjzzdRYvzjpWrTr73oFreebqNhJP47D75HdbWZqf8iCQwVJDKxbQ6OzHG8xoWd1ksNtQGUBUhMQXOt7d4/36TbansJ5neRS2akXY8GRWkGHtRJENNy85IoeV8erZc6WTeTM/M2wK/V3j9do1RmueKBU4Dz3H8Ix5/t2mJSantOPedf2We08+7CadB32+wE90OjPcuO9itaU1lhTXiUZeISLdzZv2ybyiOglkzP+wY4dWlDsF+5/3FN7mjQuWg4vg+pgwIDAQAB",
+              "version": "1.0",
+              "name": "Ephemeral App",
+              "app": {
+                "background": {
+                  "scripts": [ "main.js" ]
+                }
+              }
+            }
          }
       }
    }