First part of new ICData infrastructure: use a wrapper object instead of an array.

runtime/vm/code_patcher_arm.cc

Index: runtime/vm/code_patcher_arm.cc
===================================================================
--- runtime/vm/code_patcher_arm.cc	(revision 4401)
+++ runtime/vm/code_patcher_arm.cc	(working copy)
@@ -57,17 +57,11 @@
 }
 
 
-RawArray* CodePatcher::GetInstanceCallIcDataAt(uword return_address) {
+RawICData* CodePatcher::GetInstanceCallIcDataAt(uword return_address) {
   UNIMPLEMENTED();
   return NULL;
 }
 
-
-void CodePatcher::SetInstanceCallIcDataAt(uword return_address,
-                                         const Array& ic_data) {
-  UNIMPLEMENTED();
-}
-
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM