MIPS: Do not cache CodeStubInterfaceDescriptor on the isolate.

src/mips64/code-stubs-mips64.cc

Index: src/mips64/code-stubs-mips64.cc
diff --git a/src/mips64/code-stubs-mips64.cc b/src/mips64/code-stubs-mips64.cc
index 16441b70f8b36389be222ca6542c40c17e076b80..65b62e2e5adb330140034d239994acdd9b49cfc8 100644
--- a/src/mips64/code-stubs-mips64.cc
+++ b/src/mips64/code-stubs-mips64.cc
@@ -121,21 +121,22 @@ 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) ||
-           a0.is(descriptor->GetEnvironmentParameterRegister(param_count - 1)));
+           a0.is(descriptor.GetEnvironmentParameterRegister(param_count - 1)));
     // Push arguments, adjust sp.
     __ Dsubu(sp, sp, Operand(param_count * kPointerSize));
     for (int i = 0; i < param_count; ++i) {
       // Store argument to stack.
-      __ sd(descriptor->GetEnvironmentParameterRegister(i),
+      __ sd(descriptor.GetEnvironmentParameterRegister(i),
             MemOperand(sp, (param_count-1-i) * kPointerSize));
     }
-    ExternalReference miss = descriptor->miss_handler();
+    ExternalReference miss = descriptor.miss_handler();
     __ CallExternalReference(miss, param_count);
   }