[builtins] Migrate ArrayBufferPrototypeByteLength to C++.

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 4baca14ec8d2ae638c287ee03846f17c664f2fad..c16285af45a4317dc3dba154af9aefdac3f5e91d 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -2887,6 +2887,7 @@ void Genesis::InitializeGlobal_harmony_array_prototype_values() {
 
 Handle<JSFunction> Genesis::InstallArrayBuffer(Handle<JSObject> target,
                                                const char* name) {
+  // Create the %ArrayBufferPrototype%
   // Setup the {prototype} with the given {name} for @@toStringTag.
   Handle<JSObject> prototype =
       factory()->NewJSObject(isolate()->object_function(), TENURED);
@@ -2911,6 +2912,11 @@ Handle<JSFunction> Genesis::InstallArrayBuffer(Handle<JSObject> target,
   SimpleInstallFunction(array_buffer_fun, factory()->isView_string(),
                         Builtins::kArrayBufferIsView, 1, true);
 
+  // Install the "byteLength" getter on the {prototype}.
+  SimpleInstallGetter(prototype, factory()->byte_length_string(),
+                      Builtins::kArrayBufferPrototypeGetByteLength, false,
+                      kArrayBufferByteLength);
+
   return array_buffer_fun;
 }