[DevTools] Reduce API surface of String16.

third_party/WebKit/Source/platform/inspector_protocol/String16WTF.cpp

-// Copyright 2016 The Chromium 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 "platform/inspector_protocol/String16WTF.h"
-
-namespace blink {
-namespace protocol {
-
-String16::String16(const String16& other) : m_impl(other.m_impl) { }
-
-String16::String16(const UChar* u, unsigned length) : m_impl(u, length) { }
-
-String16::String16(const char* characters) : String16(characters, strlen(characters)) { }
-
-String16::String16(const WTF::String& other)
-{
-    if (other.isNull())
-        return;
-    if (!other.is8Bit()) {
-        m_impl = other;
-        return;
-    }
-
-    UChar* data;
-    const LChar* characters = other.characters8();
-    size_t length = other.length();
-    m_impl = String::createUninitialized(length, data);
-    for (size_t i = 0; i < length; ++i)
-        data[i] = characters[i];
-}
-
-String16::String16(const char* characters, size_t length)
-{
-    UChar* data;
-    m_impl = String::createUninitialized(length, data);
-    for (size_t i = 0; i < length; ++i)
-        data[i] = characters[i];
-}
-
-String16 String16::createUninitialized(unsigned length, UChar*& data)
-{
-    return String::createUninitialized(length, data);
-}
-
-} // namespace protocol
-} // namespace blink