X87: Do not cache CodeStubInterfaceDescriptor on the isolate.

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 f36ef80731a3c4482e3a010493393c9eebabd6e8..f9358aa78270934a44cb456d2b09195023df1176 100644
--- a/src/x87/code-stubs-x87.cc
+++ b/src/x87/code-stubs-x87.cc
@@ -115,19 +115,19 @@ void HydrogenCodeStub::GenerateLightweightMiss(MacroAssembler* masm) {
   // Update the static counter each time a new code stub is generated.
   isolate()->counters()->code_stubs()->Increment();
 
-  CodeStubInterfaceDescriptor* descriptor = GetInterfaceDescriptor();
-  int param_count = descriptor->GetEnvironmentParameterCount();
+  CodeStubInterfaceDescriptor descriptor;
+  InitializeInterfaceDescriptor(&descriptor);
+  int param_count = descriptor.GetEnvironmentParameterCount();
   {
     // Call the runtime system in a fresh internal frame.
     FrameScope scope(masm, StackFrame::INTERNAL);
     DCHECK(param_count == 0 ||
-           eax.is(descriptor->GetEnvironmentParameterRegister(
-               param_count - 1)));
+           eax.is(descriptor.GetEnvironmentParameterRegister(param_count - 1)));
     // Push arguments
     for (int i = 0; i < param_count; ++i) {
-      __ push(descriptor->GetEnvironmentParameterRegister(i));
+      __ push(descriptor.GetEnvironmentParameterRegister(i));
     }
-    ExternalReference miss = descriptor->miss_handler();
+    ExternalReference miss = descriptor.miss_handler();
     __ CallExternalReference(miss, param_count);
   }