MIPS: Compile FastCloneShallowObjectStub using Crankshaft.

src/mips/lithium-mips.cc

Index: src/mips/lithium-mips.cc
diff --git a/src/mips/lithium-mips.cc b/src/mips/lithium-mips.cc
index a6d7f1d683e89fde4f2d9e7ac89422f9a6e34f4c..cc5c10d3401b9f3cb8de1a4afefa637fba3fbe4c 100644
--- a/src/mips/lithium-mips.cc
+++ b/src/mips/lithium-mips.cc
@@ -971,6 +971,12 @@ LInstruction* LChunkBuilder::DoInstanceOfKnownGlobal(
 }
 
 
+LInstruction* LChunkBuilder::DoInstanceSize(HInstanceSize* instr) {
+  LOperand* object = UseRegisterAtStart(instr->object());
+  return DefineAsRegister(new(zone()) LInstanceSize(object));
+}
+
+
 LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) {
   LOperand* receiver = UseRegisterAtStart(instr->receiver());
   LOperand* function = UseRegisterAtStart(instr->function());