Separate Scope into DeclarationScope and Scope

src/asmjs/asm-wasm-builder.cc

Index: src/asmjs/asm-wasm-builder.cc
diff --git a/src/asmjs/asm-wasm-builder.cc b/src/asmjs/asm-wasm-builder.cc
index 338cef9d60c8fcb1e193cd68a4cc1a8eccf83529..885ba001d3c4bc48dc7e6e79f4fe32f5fb9aae01 100644
--- a/src/asmjs/asm-wasm-builder.cc
+++ b/src/asmjs/asm-wasm-builder.cc
@@ -443,7 +443,7 @@ class AsmWasmBuilderImpl final : public AstVisitor<AsmWasmBuilderImpl> {
   void VisitDebuggerStatement(DebuggerStatement* stmt) { UNREACHABLE(); }
 
   void VisitFunctionLiteral(FunctionLiteral* expr) {
-    Scope* scope = expr->scope();
+    DeclarationScope* scope = expr->scope();
     if (scope_ == kFuncScope) {
       if (auto* func_type = typer_->TypeOf(expr)->AsFunctionType()) {
         // Build the signature for the function.