MIPS: Do not cache CodeStubInterfaceDescriptor on the isolate.

src/mips/code-stubs-mips.cc

Index: src/mips/code-stubs-mips.cc
diff --git a/src/mips/code-stubs-mips.cc b/src/mips/code-stubs-mips.cc
index 4f7bdcd6baa2541d378cea0c0510a852546b2e5d..7bf5799155154882d54e7eba47c06930fb02959d 100644
--- a/src/mips/code-stubs-mips.cc
+++ b/src/mips/code-stubs-mips.cc
@@ -122,22 +122,22 @@ 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.
     __ Subu(sp, sp, Operand(param_count * kPointerSize));
     for (int i = 0; i < param_count; ++i) {
       // Store argument to stack.
-      __ sw(descriptor->GetEnvironmentParameterRegister(i),
+      __ sw(descriptor.GetEnvironmentParameterRegister(i),
             MemOperand(sp, (param_count-1-i) * kPointerSize));
     }
-    ExternalReference miss = descriptor->miss_handler();
+    ExternalReference miss = descriptor.miss_handler();
     __ CallExternalReference(miss, param_count);
   }