Fix the previously ineffective assert checking the number of arguments passed to

runtime/vm/flow_graph_compiler_x64.cc

Index: runtime/vm/flow_graph_compiler_x64.cc
===================================================================
--- runtime/vm/flow_graph_compiler_x64.cc	(revision 26825)
+++ runtime/vm/flow_graph_compiler_x64.cc	(working copy)
@@ -615,6 +615,7 @@
     GenerateCallRuntime(token_pos,
                         deopt_id,
                         kInstanceofRuntimeEntry,
+                        5,
                         locs);
     // Pop the parameters supplied to the runtime entry. The result of the
     // instanceof runtime call will be left as the result of the operation.
@@ -699,6 +700,7 @@
     GenerateCallRuntime(token_pos,
                         deopt_id,
                         kMalformedTypeErrorRuntimeEntry,
+                        3,
                         locs);
     // We should never return here.
     __ int3();
@@ -725,7 +727,7 @@
   __ PushObject(dst_name);  // Push the name of the destination.
   __ LoadObject(RAX, test_cache);
   __ pushq(RAX);
-  GenerateCallRuntime(token_pos, deopt_id, kTypeCheckRuntimeEntry, locs);
+  GenerateCallRuntime(token_pos, deopt_id, kTypeCheckRuntimeEntry, 6, locs);
   // Pop the parameters supplied to the runtime entry. The result of the
   // type check runtime call is the checked value.
   __ Drop(6);
@@ -1258,8 +1260,9 @@
 void FlowGraphCompiler::GenerateCallRuntime(intptr_t token_pos,
                                             intptr_t deopt_id,
                                             const RuntimeEntry& entry,
+                                            intptr_t argument_count,
                                             LocationSummary* locs) {
-  __ CallRuntime(entry);
+  __ CallRuntime(entry, argument_count);
   AddCurrentDescriptor(PcDescriptors::kOther, deopt_id, token_pos);
   RecordSafepoint(locs);
   if (deopt_id != Isolate::kNoDeoptId) {