[ic] Extract load IC proto array handlers handling to a separate stub.

src/arm/interface-descriptors-arm.cc

Index: src/arm/interface-descriptors-arm.cc
diff --git a/src/arm/interface-descriptors-arm.cc b/src/arm/interface-descriptors-arm.cc
index 315b5d43c7ac77bd070d51e52c7fc34ba66a57d2..75161afcd70956d7680c9ba6d058cfc8f394e627 100644
--- a/src/arm/interface-descriptors-arm.cc
+++ b/src/arm/interface-descriptors-arm.cc
@@ -31,9 +31,9 @@ const Register LoadDescriptor::ReceiverRegister() { return r1; }
 const Register LoadDescriptor::NameRegister() { return r2; }
 const Register LoadDescriptor::SlotRegister() { return r0; }
 
-
 const Register LoadWithVectorDescriptor::VectorRegister() { return r3; }
 
+const Register LoadICProtoArrayDescriptor::HandlerRegister() { return r4; }
 
 const Register StoreDescriptor::ReceiverRegister() { return r1; }
 const Register StoreDescriptor::NameRegister() { return r2; }