AK: Rename adopt() to adopt_ref()

This makes it more symmetrical with adopt_own() (which is used to
create a NonnullOwnPtr from the result of a naked new.)

Userland/Libraries/LibJS/AST.h

@@ -27,7 +27,7 @@ template<class T, class... Args>
 static inline NonnullRefPtr<T>
 create_ast_node(SourceRange range, Args&&... args)
 {
-    return adopt(*new T(range, forward<Args>(args)...));
+    return adopt_ref(*new T(range, forward<Args>(args)...));
 }
 
 class ASTNode : public RefCounted<ASTNode> {

Userland/Libraries/LibJS/Heap/Handle.h

@@ -39,7 +39,7 @@ public:
 
     static Handle create(T* cell)
     {
-        return Handle(adopt(*new HandleImpl(cell)));
+        return Handle(adopt_ref(*new HandleImpl(cell)));
     }
 
     T* cell() { return static_cast<T*>(m_impl->cell()); }

Userland/Libraries/LibJS/Parser.cpp

@@ -228,7 +228,7 @@ NonnullRefPtr<Program> Parser::parse_program()
 {
     auto rule_start = push_start();
     ScopePusher scope(*this, ScopePusher::Var | ScopePusher::Let | ScopePusher::Function);
-    auto program = adopt(*new Program({ m_filename, rule_start.position(), position() }));
+    auto program = adopt_ref(*new Program({ m_filename, rule_start.position(), position() }));
 
     bool first = true;
     while (!done()) {

Userland/Libraries/LibJS/Runtime/VM.cpp

@@ -24,7 +24,7 @@ namespace JS {
 
 NonnullRefPtr<VM> VM::create()
 {
-    return adopt(*new VM);
+    return adopt_ref(*new VM);
 }
 
 VM::VM()