Move sloppy block function hoisting logic from Parser to Scope.

src/parsing/parser.h

Index: src/parsing/parser.h
diff --git a/src/parsing/parser.h b/src/parsing/parser.h
index 38695495545aa9d69e4d6dee9adb7b42fd748472..d926a7c88130d0af5be4afa0905d7d3dfc783ee1 100644
--- a/src/parsing/parser.h
+++ b/src/parsing/parser.h
@@ -475,10 +475,8 @@ class Parser : public ParserBase<Parser> {
 
   // Implement sloppy block-scoped functions, ES2015 Annex B 3.3
   void InsertSloppyBlockFunctionVarBindings(DeclarationScope* scope,
-                                            Scope* complex_params_scope,
                                             bool* ok);
 
-  static InitializationFlag DefaultInitializationFlag(VariableMode mode);
   VariableProxy* NewUnresolved(const AstRawString* name, int begin_pos,
                                int end_pos = kNoSourcePosition,
                                Variable::Kind kind = Variable::NORMAL);