Revert of [inspector] Initial import of v8_inspector.

src/inspector/public/StringView.h

-// Copyright 2016 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_INSPECTOR_PUBLIC_STRINGVIEW_H_
-#define V8_INSPECTOR_PUBLIC_STRINGVIEW_H_
-
-#include <cctype>
-#include <stdint.h>
-
-namespace v8_inspector {
-
-class PLATFORM_EXPORT StringView {
-public:
-    StringView()
-        : m_is8Bit(true)
-        , m_length(0)
-        , m_characters8(nullptr) {}
-
-    StringView(const uint8_t* characters, unsigned length)
-        : m_is8Bit(true)
-        , m_length(length)
-        , m_characters8(characters) {}
-
-    StringView(const uint16_t* characters, unsigned length)
-        : m_is8Bit(false)
-        , m_length(length)
-        , m_characters16(characters) {}
-
-    bool is8Bit() const { return m_is8Bit; }
-    unsigned length() const { return m_length; }
-
-    // TODO(dgozman): add DCHECK(m_is8Bit) to accessors once platform can be used here.
-    const uint8_t* characters8() const { return m_characters8; }
-    const uint16_t* characters16() const { return m_characters16; }
-
-private:
-    bool m_is8Bit;
-    unsigned m_length;
-    union {
-        const uint8_t* m_characters8;
-        const uint16_t* m_characters16;
-    };
-};
-
-} // namespace v8_inspector
-
-#endif // V8_INSPECTOR_PUBLIC_STRINGVIEW_H_