Send a message to the client if bad It2Me policies are read.

remoting/host/policy_watcher_unittest.cc

Index: remoting/host/policy_watcher_unittest.cc
diff --git a/remoting/host/policy_watcher_unittest.cc b/remoting/host/policy_watcher_unittest.cc
index 3447f56920edc130c65add4286e8463e6e2ba99e..2b220a218594b5a5c5b679cb0c8d7d7c24d1ec59 100644
--- a/remoting/host/policy_watcher_unittest.cc
+++ b/remoting/host/policy_watcher_unittest.cc
@@ -784,4 +784,14 @@ TEST_F(PolicyWatcherTest, GetCurrentPolicies) {
   ASSERT_TRUE(*current_policies == nat_false_others_default_);
 }
 
+TEST_F(PolicyWatcherTest, GetCurrentPoliciesError) {
+  EXPECT_CALL(mock_policy_callback_, OnPolicyError());
+
+  SetPolicies(nat_one_);
+  StartWatching();
+  std::unique_ptr<base::DictionaryValue> current_policies =
+      policy_watcher_->GetCurrentPolicies();
+  ASSERT_EQ(0u, current_policies->size());
+}
+
 }  // namespace remoting