Remove support for externally backed elements from the API

test/unittests/test-utils.h

 // Copyright 2014 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.
 
 #ifndef V8_UNITTESTS_TEST_UTILS_H_
 #define V8_UNITTESTS_TEST_UTILS_H_
 
 #include "include/v8.h"
 #include "src/base/macros.h"
 #include "src/base/utils/random-number-generator.h"
 #include "src/zone.h"
 #include "testing/gtest-support.h"
 
 namespace v8 {
 
-std::ostream& operator<<(std::ostream&, ExternalArrayType);
-
 
 class TestWithIsolate : public virtual ::testing::Test {
  public:
   TestWithIsolate();
   virtual ~TestWithIsolate();
 
   Isolate* isolate() const { return isolate_; }
 
   static void SetUpTestCase();
   static void TearDownTestCase();
@@ skipping 87 matching lines @@
   Zone zone_;
 
   DISALLOW_COPY_AND_ASSIGN(TestWithIsolateAndZone);
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_UNITTESTS_TEST_UTILS_H_