Move ArrayBuffer.prototype.slice implementation to C++

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 29d0a7e4cdae2fd95ba600c7db45863eff80c73c..3e5264dd94ab154bdbd2f775e75175f0164df2c7 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -223,7 +223,7 @@ class Genesis BASE_EMBEDDED {
 
   Handle<JSFunction> InstallArrayBuffer(Handle<JSObject> target,
                                         const char* name, Builtins::Name call,
-                                        BuiltinFunctionId id);
+                                        BuiltinFunctionId id, bool is_shared);
   Handle<JSFunction> InstallInternalArray(Handle<JSObject> target,
                                           const char* name,
                                           ElementsKind elements_kind);
@@ -2550,7 +2550,7 @@ void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object,
   {  // -- A r r a y B u f f e r
     Handle<JSFunction> array_buffer_fun = InstallArrayBuffer(
         global, "ArrayBuffer", Builtins::kArrayBufferPrototypeGetByteLength,
-        BuiltinFunctionId::kArrayBufferByteLength);
+        BuiltinFunctionId::kArrayBufferByteLength, false);
     InstallWithIntrinsicDefaultProto(isolate, array_buffer_fun,
                                      Context::ARRAY_BUFFER_FUN_INDEX);
     InstallSpeciesGetter(array_buffer_fun);
@@ -3688,7 +3688,7 @@ void Genesis::InitializeGlobal_harmony_sharedarraybuffer() {
   Handle<JSFunction> shared_array_buffer_fun =
       InstallArrayBuffer(global, "SharedArrayBuffer",
                          Builtins::kSharedArrayBufferPrototypeGetByteLength,
-                         BuiltinFunctionId::kSharedArrayBufferByteLength);
+                         BuiltinFunctionId::kSharedArrayBufferByteLength, true);
   native_context()->set_shared_array_buffer_fun(*shared_array_buffer_fun);
 
   Handle<String> name = factory->InternalizeUtf8String("Atomics");
@@ -3867,7 +3867,8 @@ void Genesis::InitializeGlobal_icu_case_mapping() {
 Handle<JSFunction> Genesis::InstallArrayBuffer(Handle<JSObject> target,
                                                const char* name,
                                                Builtins::Name call,
-                                               BuiltinFunctionId id) {
+                                               BuiltinFunctionId id,
+                                               bool is_shared) {
   // Create the %ArrayBufferPrototype%
   // Setup the {prototype} with the given {name} for @@toStringTag.
   Handle<JSObject> prototype =
@@ -3897,6 +3898,12 @@ Handle<JSFunction> Genesis::InstallArrayBuffer(Handle<JSObject> target,
   SimpleInstallGetter(prototype, factory()->byte_length_string(), call, false,
                       id);
 
+  // TODO(binji): support SharedArrayBuffer.prototype.slice as well.
+  if (!is_shared) {
+    SimpleInstallFunction(prototype, "slice",
+                          Builtins::kArrayBufferPrototypeSlice, 2, true);
+  }
+
   return array_buffer_fun;
 }