Precompilation: Generate instance calls as IC calls that can switch to Megamoprhic calls.

runtime/vm/dart.cc

Index: runtime/vm/dart.cc
diff --git a/runtime/vm/dart.cc b/runtime/vm/dart.cc
index 06ae6cfc100f69f4d0d4c01b745a8de2409ce16f..f4a3baf5861e8e69058e2327bd2f9bcd5e3b0aed 100644
--- a/runtime/vm/dart.cc
+++ b/runtime/vm/dart.cc
@@ -352,6 +352,10 @@ RawError* Dart::InitializeIsolate(const uint8_t* snapshot_buffer, void* data) {
   if (!Dart::IsRunningPrecompiledCode()) {
     MegamorphicCacheTable::InitMissHandler(I);
   }
+  const Function& miss_function =
+      Function::Handle(I->object_store()->megamorphic_miss_function());
+  I->set_ic_miss_function(miss_function);
+
   if (snapshot_buffer == NULL) {
     if (!I->object_store()->PreallocateObjects()) {
       return I->object_store()->sticky_error();