Remove timing limitation of SetOption invocation for PPAPI sockets.

ppapi/proxy/udp_socket_resource_base.h

Index: ppapi/proxy/udp_socket_resource_base.h
diff --git a/ppapi/proxy/udp_socket_resource_base.h b/ppapi/proxy/udp_socket_resource_base.h
index 5400f6be99554d3dec8f57d430d1912954fd8c54..918c3f5c04eab2d59430cc56423d83a24e891d22 100644
--- a/ppapi/proxy/udp_socket_resource_base.h
+++ b/ppapi/proxy/udp_socket_resource_base.h
@@ -54,6 +54,7 @@ class PPAPI_PROXY_EXPORT UDPSocketResourceBase: public PluginResource {
 
   int32_t SetOptionImpl(PP_UDPSocket_Option name,
                         const PP_Var& value,
+                        bool check_bind_state,
                         scoped_refptr<TrackedCallback> callback);
   int32_t BindImpl(const PP_NetAddress_Private* addr,
                    scoped_refptr<TrackedCallback> callback);
@@ -106,6 +107,11 @@ class PPAPI_PROXY_EXPORT UDPSocketResourceBase: public PluginResource {
                             PP_Resource* output_addr);
 
   bool private_api_;
+
+  // |bind_called_| is true if Bind() is called, while |bound_| is true,
+  // after Bind() succeeds. Bind() is an asynchronous method, so
+  // the timing on which of these is set is slightly different.
+  bool bind_called_;
   bool bound_;
   bool closed_;