Disable sync for default apps

chrome/browser/extensions/extension_prefs_unittest.cc

Index: chrome/browser/extensions/extension_prefs_unittest.cc
diff --git a/chrome/browser/extensions/extension_prefs_unittest.cc b/chrome/browser/extensions/extension_prefs_unittest.cc
index 7d2f779fb8edb8037a8b59ab07acf09de6530524..5260c2be66f4cd95da77102d595037886fb9d892 100644
--- a/chrome/browser/extensions/extension_prefs_unittest.cc
+++ b/chrome/browser/extensions/extension_prefs_unittest.cc
@@ -796,6 +796,14 @@ class ExtensionPrefsFlags : public ExtensionPrefsTest {
       bookmark_extension_ = prefs_.AddExtensionWithManifestAndFlags(
           dictionary, Extension::INTERNAL, Extension::FROM_BOOKMARK);
     }
+
+    {
+      base::DictionaryValue dictionary;
+      dictionary.SetString(extension_manifest_keys::kName, "from_default");
+      dictionary.SetString(extension_manifest_keys::kVersion, "0.1");
+      default_extension_ = prefs_.AddExtensionWithManifestAndFlags(
+          dictionary, Extension::INTERNAL, Extension::FROM_DEFAULT);
+    }
   }
 
   virtual void Verify() {
@@ -804,11 +812,14 @@ class ExtensionPrefsFlags : public ExtensionPrefsTest {
 
     EXPECT_TRUE(prefs()->IsFromBookmark(bookmark_extension_->id()));
     EXPECT_FALSE(prefs()->IsFromWebStore(bookmark_extension_->id()));
+
+    EXPECT_TRUE(prefs()->IsFromDefault(default_extension_->id()));
   }
 
  private:
   scoped_refptr<Extension> webstore_extension_;
   scoped_refptr<Extension> bookmark_extension_;
+  scoped_refptr<Extension> default_extension_;
 };
 TEST_F(ExtensionPrefsFlags, ExtensionPrefsFlags) {}