[es6] Function constructor-created functions should be named "anonymous"

Besides matching the spec, this matches the behavior of Firefox and Edge.

BUG=v8:3699
LOG=n
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1377603006

Cr-Commit-Position: refs/heads/master@{#31030}

src/accessors.cc

@@ -1074,7 +1074,12 @@ void Accessors::FunctionNameGetter(
   HandleScope scope(isolate);
   Handle<JSFunction> function =
       Handle<JSFunction>::cast(Utils::OpenHandle(*info.Holder()));
-  Handle<Object> result(function->shared()->name(), isolate);
+  Handle<Object> result;
+  if (function->shared()->name_should_print_as_anonymous()) {
+    result = isolate->factory()->anonymous_string();
+  } else {
+    result = handle(function->shared()->name(), isolate);
+  }
   info.GetReturnValue().Set(Utils::ToLocal(result));
 }
 

src/heap/heap.h

@@ -303,7 +303,8 @@ namespace internal {
   V(minus_zero_string, "-0")                                   \
   V(Array_string, "Array")                                     \
   V(Error_string, "Error")                                     \
-  V(RegExp_string, "RegExp")
+  V(RegExp_string, "RegExp")                                   \
+  V(anonymous_string, "anonymous")
 
 #define PRIVATE_SYMBOL_LIST(V)              \
   V(array_iteration_kind_symbol)            \

test/test262/test262.status

@@ -423,8 +423,6 @@
   'language/expressions/assignment/S11.13.1_A6*': [FAIL],
 
   # https://code.google.com/p/v8/issues/detail?id=3699
-  'built-ins/Function/instance-name': [FAIL],
-  'built-ins/GeneratorFunction/instance-name': [FAIL],
   'language/expressions/assignment/fn-name-arrow': [FAIL],
   'language/expressions/assignment/fn-name-class': [FAIL],
   'language/expressions/assignment/fn-name-cover': [FAIL],