Compile FastCloneShallowObjectStub using Crankshaft.

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index c7b4382a8d710c026a96e24a6b4ebffdf43463e5..69fd5e4209c05b0b5120f05ea646cf6dc48b0a6b 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -972,6 +972,12 @@ 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());