Also allocate small typed arrays on heap when initialized from an array-like

test/cctest/test-typedarrays.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdlib.h>
 
 #include "src/v8.h"
 #include "test/cctest/cctest.h"
 
 #include "src/api.h"
@@ skipping 30 matching lines @@
       "a[2] = 2;"
       "a[3] = 3;");
   TestArrayBufferViewContents(env, false);
 }
 
 
 TEST(CopyContentsArray) {
   LocalContext env;
   v8::HandleScope scope(env->GetIsolate());
   CompileRun("var a = new Uint8Array([0, 1, 2, 3]);");
-  TestArrayBufferViewContents(env, true);
+  TestArrayBufferViewContents(env, false);
 }
 
 
 TEST(CopyContentsView) {
   LocalContext env;
   v8::HandleScope scope(env->GetIsolate());
   CompileRun(
       "var b = new ArrayBuffer(6);"
       "var c = new Uint8Array(b);"
       "c[0] = -1;"
@@ skipping 12 matching lines @@
   v8::HandleScope scope(env->GetIsolate());
   void* memory = reinterpret_cast<Isolate*>(env->GetIsolate())
                      ->array_buffer_allocator()
                      ->Allocate(1024);
   v8::Local<v8::ArrayBuffer> buffer =
       v8::ArrayBuffer::New(env->GetIsolate(), memory, 1024,
                            v8::ArrayBufferCreationMode::kInternalized);
   CHECK(!buffer->IsExternal());
   CHECK_EQ(memory, buffer->GetContents().Data());
 }