Exempt default apps from external-extension alerts.

chrome/browser/extensions/external_extension_provider_impl.h

Index: chrome/browser/extensions/external_extension_provider_impl.h
diff --git a/chrome/browser/extensions/external_extension_provider_impl.h b/chrome/browser/extensions/external_extension_provider_impl.h
index 80044c982d74b6139d42f45b6391fb7e7e38d8dd..242c61837e9c66863b843551dfa895ac2c8e99ce 100644
--- a/chrome/browser/extensions/external_extension_provider_impl.h
+++ b/chrome/browser/extensions/external_extension_provider_impl.h
@@ -71,6 +71,10 @@ class ExternalExtensionProviderImpl
   static const char kExternalUpdateUrl[];
   static const char kSupportedLocales[];
 
+  void set_auto_acknowledge(bool auto_acknowledge) {
+    auto_acknowledge_ = auto_acknowledge;
+  }
+
  private:
   // Location for external extensions that are provided by this provider from
   // local crx files.
@@ -99,6 +103,10 @@ class ExternalExtensionProviderImpl
   // when calling Extenion::Create() by the crx installer.
   int creation_flags_;
 
+  // Whether loaded extensions should be automatically acknowledged, so that
+  // the user doesn't see an alert about them.
+  bool auto_acknowledge_;
+
   DISALLOW_COPY_AND_ASSIGN(ExternalExtensionProviderImpl);
 };