Add policy controlled permission block list for extensions

extensions/browser/management_policy.cc

Index: extensions/browser/management_policy.cc
diff --git a/extensions/browser/management_policy.cc b/extensions/browser/management_policy.cc
index 156ba64d456257361a90c0a94107156814b727a4..b09734a908b31b3b1c5c82a4555ed320544aa9d1 100644
--- a/extensions/browser/management_policy.cc
+++ b/extensions/browser/management_policy.cc
@@ -61,6 +61,10 @@ void ManagementPolicy::UnregisterProvider(Provider* provider) {
   providers_.erase(provider);
 }
 
+void ManagementPolicy::RegisterProviders(std::vector<Provider*> providers) {
+  providers_.insert(providers.begin(), providers.end());
+}
+
 bool ManagementPolicy::UserMayLoad(const Extension* extension,
                                    base::string16* error) const {
   return ApplyToProviderList(