[runtime] Remove unused %GetPrototype.

The %GetPrototype runtime function is not used anymore. Also remove the
cctests that were introduced to guard the Crankshaft optimizations for
the %_GetPrototype intrinsic.

Bug: v8:8015
Change-Id: I4b848f2c8d67209dae002d260a26867299d6b4a5
Reviewed-on: https://chromium-review.googlesource.com/1199106Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55541}

src/runtime/runtime-object.cc

@@ -459,14 +459,6 @@ MaybeHandle<Object> Runtime::SetObjectProperty(Isolate* isolate,
 }
 
 
-RUNTIME_FUNCTION(Runtime_GetPrototype) {
-  HandleScope scope(isolate);
-  DCHECK_EQ(1, args.length());
-  CONVERT_ARG_HANDLE_CHECKED(JSReceiver, obj, 0);
-  RETURN_RESULT_OR_FAILURE(isolate, JSReceiver::GetPrototype(isolate, obj));
-}
-
-
 RUNTIME_FUNCTION(Runtime_InternalSetPrototype) {
   HandleScope scope(isolate);
   DCHECK_EQ(2, args.length());

src/runtime/runtime.h

@@ -325,7 +325,6 @@ namespace internal {
   F(GetOwnPropertyDescriptor, 2, 1)                             \
   F(GetOwnPropertyKeys, 2, 1)                                   \
   F(GetProperty, 2, 1)                                          \
-  F(GetPrototype, 1, 1)                                         \
   F(HasFastPackedElements, 1, 1)                                \
   F(HasInPrototypeChain, 2, 1)                                  \
   F(HasProperty, 2, 1)                                          \

test/cctest/test-api.cc

@@ -26450,58 +26450,6 @@ TEST(TurboAsmDisablesNeuter) {
   CHECK(!result->IsNeuterable());
 }
 
-TEST(GetPrototypeAccessControl) {
-  i::FLAG_allow_natives_syntax = true;
-  v8::Isolate* isolate = CcTest::isolate();
-  v8::HandleScope handle_scope(isolate);
-  LocalContext env;
-
-  v8::Local<v8::ObjectTemplate> obj_template = v8::ObjectTemplate::New(isolate);
-  obj_template->SetAccessCheckCallback(AccessAlwaysBlocked);
-
-  CHECK(env->Global()
-            ->Set(env.local(), v8_str("prohibited"),
-                  obj_template->NewInstance(env.local()).ToLocalChecked())
-            .FromJust());
-
-  CHECK(CompileRun(
-            "function f() { return %_GetPrototype(prohibited); }"
-            "%OptimizeFunctionOnNextCall(f);"
-            "f();")->IsNull());
-}
-
-
-TEST(GetPrototypeHidden) {
-  i::FLAG_allow_natives_syntax = true;
-  v8::Isolate* isolate = CcTest::isolate();
-  v8::HandleScope handle_scope(isolate);
-  LocalContext env;
-
-  Local<FunctionTemplate> t = FunctionTemplate::New(isolate);
-  t->SetHiddenPrototype(true);
-  Local<Object> proto = t->GetFunction(env.local())
-                            .ToLocalChecked()
-                            ->NewInstance(env.local())
-                            .ToLocalChecked();
-  Local<Object> object = Object::New(isolate);
-  Local<Object> proto2 = Object::New(isolate);
-  object->SetPrototype(env.local(), proto).FromJust();
-  proto->SetPrototype(env.local(), proto2).FromJust();
-
-  CHECK(env->Global()->Set(env.local(), v8_str("object"), object).FromJust());
-  CHECK(env->Global()->Set(env.local(), v8_str("proto"), proto).FromJust());
-  CHECK(env->Global()->Set(env.local(), v8_str("proto2"), proto2).FromJust());
-
-  v8::Local<v8::Value> result = CompileRun("%_GetPrototype(object)");
-  CHECK(result->Equals(env.local(), proto2).FromJust());
-
-  result = CompileRun(
-      "function f() { return %_GetPrototype(object); }"
-      "%OptimizeFunctionOnNextCall(f);"
-      "f()");
-  CHECK(result->Equals(env.local(), proto2).FromJust());
-}
-
 
 TEST(ClassPrototypeCreationContext) {
   v8::Isolate* isolate = CcTest::isolate();