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

src/interface-descriptors.h

Index: src/interface-descriptors.h
diff --git a/src/interface-descriptors.h b/src/interface-descriptors.h
index b376df1dbb1f1ac7e1d6166a4f71160f7ea62d9e..3b49041a097539189ffd56cfbc45ed4dab76f0cd 100644
--- a/src/interface-descriptors.h
+++ b/src/interface-descriptors.h
@@ -21,6 +21,7 @@ class PlatformInterfaceDescriptor;
   V(ContextOnly)                          \
   V(Load)                                 \
   V(LoadWithVector)                       \
+  V(LoadICProtoArray)                     \
   V(LoadGlobal)                           \
   V(LoadGlobalWithVector)                 \
   V(Store)                                \
@@ -389,6 +390,15 @@ class LoadWithVectorDescriptor : public LoadDescriptor {
   static const Register VectorRegister();
 };
 
+class LoadICProtoArrayDescriptor : public LoadWithVectorDescriptor {
+ public:
+  DEFINE_PARAMETERS(kReceiver, kName, kSlot, kVector, kHandler)
+  DECLARE_DESCRIPTOR_WITH_CUSTOM_FUNCTION_TYPE(LoadICProtoArrayDescriptor,
+                                               LoadWithVectorDescriptor)
+
+  static const Register HandlerRegister();
+};
+
 class LoadGlobalWithVectorDescriptor : public LoadGlobalDescriptor {
  public:
   DEFINE_PARAMETERS(kSlot, kVector)