X87: Initialize CodeStubInterfaceDescriptor in the constructor.

src/x87/code-stubs-x87.cc

Index: src/x87/code-stubs-x87.cc
diff --git a/src/x87/code-stubs-x87.cc b/src/x87/code-stubs-x87.cc
index f9358aa78270934a44cb456d2b09195023df1176..7fd43b8e481254e6595751cefae5221017fc22b7 100644
--- a/src/x87/code-stubs-x87.cc
+++ b/src/x87/code-stubs-x87.cc
@@ -115,8 +115,7 @@ void HydrogenCodeStub::GenerateLightweightMiss(MacroAssembler* masm) {
   // Update the static counter each time a new code stub is generated.
   isolate()->counters()->code_stubs()->Increment();
 
-  CodeStubInterfaceDescriptor descriptor;
-  InitializeInterfaceDescriptor(&descriptor);
+  CodeStubInterfaceDescriptor descriptor(this);
   int param_count = descriptor.GetEnvironmentParameterCount();
   {
     // Call the runtime system in a fresh internal frame.