Disable install of new default_apps for existing users

chrome/browser/extensions/default_apps.h

Index: chrome/browser/extensions/default_apps.h
diff --git a/chrome/browser/extensions/default_apps.h b/chrome/browser/extensions/default_apps.h
index 7c13c8cda4b057debc485463735913061aa89823..672ead76284bedaef62fa328add44d2ebbafca6b 100644
--- a/chrome/browser/extensions/default_apps.h
+++ b/chrome/browser/extensions/default_apps.h
@@ -15,6 +15,10 @@ namespace extensions {
 class Extension;
 }
 
+namespace base {
+class DictionaryValue;
+}
+
 // Functions and types related to installing default apps.
 namespace default_apps {
 
@@ -28,10 +32,6 @@ enum InstallState {
   kAlreadyInstalledDefaultApps
 };
 
-bool ShouldInstallInProfile(Profile* profile);
-
-bool isLocaleSupported();
-
 // Register preference properties used by default apps to maintain
 // install state.
 void RegisterUserPrefs(PrefService* prefs);
@@ -50,9 +50,13 @@ class Provider : public extensions::ExternalProviderImpl {
 
   // ExternalProviderImpl overrides:
   virtual void VisitRegisteredExtension() OVERRIDE;
+  virtual void SetPrefs(base::DictionaryValue* prefs) OVERRIDE;
 
  private:
+  bool ShouldInstallInProfile();
+
   Profile* profile_;
+  bool isMigration_;
 
   DISALLOW_COPY_AND_ASSIGN(Provider);
 };