More simplification and unification of frame handling

src/crankshaft/arm64/lithium-codegen-arm64.h

Index: src/crankshaft/arm64/lithium-codegen-arm64.h
diff --git a/src/crankshaft/arm64/lithium-codegen-arm64.h b/src/crankshaft/arm64/lithium-codegen-arm64.h
index 18856da15489056f49ae43bab074efbd02ececc2..cf7de10394e01940752493c32fb875d4d98f59dc 100644
--- a/src/crankshaft/arm64/lithium-codegen-arm64.h
+++ b/src/crankshaft/arm64/lithium-codegen-arm64.h
@@ -49,10 +49,8 @@ class LCodeGen: public LCodeGenBase {
   }
 
   bool NeedsEagerFrame() const {
-    return GetStackSlotCount() > 0 ||
-        info()->is_non_deferred_calling() ||
-        !info()->IsStub() ||
-        info()->requires_frame();
+    return HasAllocatedStackSlots() || info()->is_non_deferred_calling() ||
+           !info()->IsStub() || info()->requires_frame();
   }
   bool NeedsDeferredFrame() const {
     return !NeedsEagerFrame() && info()->is_deferred_calling();
@@ -253,7 +251,13 @@ class LCodeGen: public LCodeGenBase {
   void RegisterEnvironmentForDeoptimization(LEnvironment* environment,
                                             Safepoint::DeoptMode mode);
 
-  int GetStackSlotCount() const { return chunk()->spill_slot_count(); }
+  bool HasAllocatedStackSlots() const {
+    return chunk()->HasAllocatedStackSlots();
+  }
+  int GetStackSlotCount() const { return chunk()->GetSpillSlotCount(); }
+  int GetTotalFrameSlotCount() const {
+    return chunk()->GetTotalFrameSlotCount();
+  }
 
   void AddDeferredCode(LDeferredCode* code) { deferred_.Add(code, zone()); }