[cleanup] Remove dead code from DeclareLookupSlot and rename it

src/full-codegen/mips64/full-codegen-mips64.cc

Index: src/full-codegen/mips64/full-codegen-mips64.cc
diff --git a/src/full-codegen/mips64/full-codegen-mips64.cc b/src/full-codegen/mips64/full-codegen-mips64.cc
index 759a915658a8d70dcef87d486706c8b51bf145cc..ca1bcc2a5253132cd0db43bdf2937ff2ccdd233c 100644
--- a/src/full-codegen/mips64/full-codegen-mips64.cc
+++ b/src/full-codegen/mips64/full-codegen-mips64.cc
@@ -796,15 +796,11 @@ void FullCodeGenerator::VisitVariableDeclaration(
 
     case VariableLocation::LOOKUP: {
       Comment cmnt(masm_, "[ VariableDeclaration");
-      __ li(a2, Operand(variable->name()));
-      // Declaration nodes are always introduced in one of four modes.
-      DCHECK(IsDeclaredVariableMode(mode));
+      DCHECK_EQ(VAR, mode);
       DCHECK(!hole_init);
-      DCHECK(Smi::FromInt(0) == 0);
-      __ mov(a0, zero_reg);  // Smi::FromInt(0) indicates no initial value.
-      __ Push(a2, a0);
-      __ Push(Smi::FromInt(variable->DeclarationPropertyAttributes()));
-      __ CallRuntime(Runtime::kDeclareLookupSlot);
+      __ li(a2, Operand(variable->name()));
+      __ Push(a2);
+      __ CallRuntime(Runtime::kDeclareEvalVar);
       PrepareForBailoutForId(proxy->id(), BailoutState::NO_REGISTERS);
       break;
     }
@@ -861,8 +857,7 @@ void FullCodeGenerator::VisitFunctionDeclaration(
       PushOperand(a2);
       // Push initial value for function declaration.
       VisitForStackValue(declaration->fun());
-      PushOperand(Smi::FromInt(variable->DeclarationPropertyAttributes()));
-      CallRuntimeWithOperands(Runtime::kDeclareLookupSlot);
+      CallRuntimeWithOperands(Runtime::kDeclareEvalFunction);
       PrepareForBailoutForId(proxy->id(), BailoutState::NO_REGISTERS);
       break;
     }