Fixes and improvements to cloud policy for extensions.

chrome/browser/policy/forwarding_policy_provider.cc

Index: chrome/browser/policy/forwarding_policy_provider.cc
diff --git a/chrome/browser/policy/forwarding_policy_provider.cc b/chrome/browser/policy/forwarding_policy_provider.cc
index 31873e9ff62f53937eb9b5149bcb22c49484ca3a..82dad46e305e7db94d80b0bcd6b5315fece7e5ef 100644
--- a/chrome/browser/policy/forwarding_policy_provider.cc
+++ b/chrome/browser/policy/forwarding_policy_provider.cc
@@ -60,9 +60,16 @@ void ForwardingPolicyProvider::OnSchemaRegistryReady() {
 }
 
 void ForwardingPolicyProvider::OnSchemaRegistryUpdated(bool has_new_schemas) {
-  if (!has_new_schemas || state_ != READY)
+  if (state_ != READY)
     return;
-  RefreshPolicies();
+  if (has_new_schemas) {
+    RefreshPolicies();
+  } else {
+    // Remove the policies that were being served for the component that have
+    // been removed. This is important so that update notifications are also
+    // sent in case those component are reinstalled during the current session.
+    OnUpdatePolicy(delegate_);
+  }
 }
 
 void ForwardingPolicyProvider::OnUpdatePolicy(