Implement an IsAllowed function in the pepper PPB_Broker_Trusted API

ppapi/tests/test_broker.h

Index: ppapi/tests/test_broker.h
diff --git a/ppapi/tests/test_broker.h b/ppapi/tests/test_broker.h
index a45900e207637c8fc4d8cdd2846a4de5865925f7..ee869f641cf2f6e3c8225be0c30b6236266076d1 100644
--- a/ppapi/tests/test_broker.h
+++ b/ppapi/tests/test_broker.h
@@ -26,6 +26,8 @@ class TestBroker : public TestCase {
   std::string TestConnectAndPipe();
   std::string TestConnectPermissionDenied();
   std::string TestConnectPermissionGranted();
+  std::string TestIsAllowedPermissionDenied();
+  std::string TestIsAllowedPermissionGranted();
 
   const PPB_BrokerTrusted* broker_interface_;
 };