[proxies] Implement Proxy.name

LOG=n
BUG=v8:1543

Review URL: https://codereview.chromium.org/1531683002

Cr-Commit-Position: refs/heads/master@{#32891}

src/bootstrapper.cc

@@ -2320,7 +2320,7 @@ void Genesis::InitializeGlobal_harmony_proxies() {
   Handle<Code> code(isolate->builtins()->ProxyConstructor());
 
   Handle<JSFunction> proxy_function = factory->NewFunction(
-      isolate->proxy_function_map(), factory->Object_string(), code);
+      isolate->proxy_function_map(), factory->Proxy_string(), code);
 
   JSFunction::SetInitialMap(proxy_function,
                             Handle<Map>(native_context()->proxy_map(), isolate),

src/objects-printer.cc

@@ -849,7 +849,7 @@ void JSFunction::JSFunctionPrint(std::ostream& os) {  // NOLINT
   os << "\n - initial_map = ";
   if (has_initial_map()) os << Brief(initial_map());
   os << "\n - shared_info = " << Brief(shared());
-  os << "\n   - name = " << Brief(shared()->name());
+  os << "\n - name = " << Brief(shared()->name());
   if (shared()->is_generator()) {
     os << "\n   - generator";
   }