Update some switchable call stub names and comments.

runtime/vm/flow_graph_compiler_arm.cc

Index: runtime/vm/flow_graph_compiler_arm.cc
diff --git a/runtime/vm/flow_graph_compiler_arm.cc b/runtime/vm/flow_graph_compiler_arm.cc
index 7a52718fc2b983b19c1515c91082bcbb5d874974..dadc66a42fa226989e57cf224da8e942bd8b78fb 100644
--- a/runtime/vm/flow_graph_compiler_arm.cc
+++ b/runtime/vm/flow_graph_compiler_arm.cc
@@ -1334,7 +1334,7 @@ void FlowGraphCompiler::EmitMegamorphicInstanceCall(
     __ Comment("Slow case: megamorphic call");
   }
   __ LoadObject(R9, cache);
-  __ ldr(LR, Address(THR, Thread::megamorphic_lookup_checked_entry_offset()));
+  __ ldr(LR, Address(THR, Thread::megamorphic_call_checked_entry_offset()));
   __ blx(LR);
 
   __ Bind(&done);
@@ -1375,7 +1375,7 @@ void FlowGraphCompiler::EmitSwitchableInstanceCall(
     LocationSummary* locs) {
   ASSERT(ic_data.NumArgsTested() == 1);
   const Code& initial_stub = Code::ZoneHandle(
-      StubCode::ICLookupThroughFunction_entry()->code());
+      StubCode::ICCallThroughFunction_entry()->code());
 
   __ Comment("SwitchableCall");