Implement an IsAllowed function in the pepper PPB_Broker_Trusted API

ppapi/thunk/ppb_broker_api.h

Index: ppapi/thunk/ppb_broker_api.h
diff --git a/ppapi/thunk/ppb_broker_api.h b/ppapi/thunk/ppb_broker_api.h
index 803c99e63c0ad634655781817c7cbda814d1bc80..8ac1dd2e547c28ab263c670c3351bef4ddf8f5ff 100644
--- a/ppapi/thunk/ppb_broker_api.h
+++ b/ppapi/thunk/ppb_broker_api.h
@@ -6,8 +6,10 @@
 #define PPAPI_THUNK_PPB_BROKER_API_H_
 
 #include "base/memory/ref_counted.h"
+#include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_stdint.h"
+#include "ppapi/shared_impl/singleton_resource_id.h"
 
 namespace ppapi {
 
@@ -23,6 +25,19 @@ class PPB_Broker_API {
   virtual int32_t GetHandle(int32_t* handle) = 0;
 };
 
+// TODO(raymes): Merge this into PPB_Broker_API when the PPB_Broker proxy is
+// refactored to the new resource model. The IsAllowed function should be
+// attached to the resource implementing the PPB_Broker_API. However in order to
+// implement this quickly, the function is added in a new instance API.
+class PPB_Broker_Instance_API {
+ public:
+  virtual ~PPB_Broker_Instance_API() {}
+
+  virtual PP_Bool IsAllowed() = 0;
+
+  static const SingletonResourceID kSingletonResourceID = BROKER_SINGLETON_ID;
+};
+
 }  // namespace thunk
 }  // namespace ppapi