[turbofan] Simplifying handling of callee-cleanup stack area.

src/compiler/arm/code-generator-arm.cc

Index: src/compiler/arm/code-generator-arm.cc
diff --git a/src/compiler/arm/code-generator-arm.cc b/src/compiler/arm/code-generator-arm.cc
index 0c97f846f0cff35eaccb09b24a02ca10f81dcca5..b472feb0af08d23f0ab20129cef0fc113ab685fe 100644
--- a/src/compiler/arm/code-generator-arm.cc
+++ b/src/compiler/arm/code-generator-arm.cc
@@ -1049,11 +1049,7 @@ void CodeGenerator::AssembleReturn() {
     } else {
       __ bind(&return_label_);
       __ LeaveFrame(StackFrame::MANUAL);
-      int pop_count = descriptor->IsJSFunctionCall()
-                          ? static_cast<int>(descriptor->JSParameterCount())
-                          : (info()->IsStub()
-                                 ? info()->code_stub()->GetStackParameterCount()
-                                 : 0);
+      int pop_count = static_cast<int>(descriptor->StackParameterCount());
       if (pop_count != 0) {
         __ Drop(pop_count);
       }