Fix incorrect usage of StringImpl::sizeInBytes.

third_party/WebKit/Source/platform/inspector_protocol/String16STL.h

 // 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.
 
 #ifndef String16STL_h
 #define String16STL_h
 
 #include <cctype>
 #include <cstdlib>
 #include <cstring>
@@ skipping 21 matching lines @@
     String16(const char* characters) : String16(characters, std::strlen(characters)) { }
     String16(const char* characters, size_t size)
     {
         m_impl.resize(size);
         for (size_t i = 0; i < size; ++i)
             m_impl[i] = characters[i];
     }
     String16(const UChar* characters, size_t size) : m_impl(characters, size) { }
     String16 isolatedCopy() const { return String16(m_impl); }
 
-    unsigned sizeInBytes() const { return m_impl.size() * sizeof(UChar); }
+    size_t charactersSizeInBytes() const { return m_impl.size() * sizeof(UChar); }
     const UChar* characters16() const { return m_impl.c_str(); }
     std::string utf8() const;
     static String16 fromUTF8(const char* stringStart, size_t length);
     static String16 fromInteger(int i) { return String16(String16::intToString(i).c_str()); }
     static String16 fromDouble(double d) { return String16(String16::doubleToString(d).c_str()); }
     static String16 fromDoubleFixedPrecision(double d, int len) { return String16(String16::doubleToString(d).c_str()); }
 
     static double charactersToDouble(const UChar* characters, size_t length, bool* ok = 0)
     {
         std::string str;
@@ skipping 201 matching lines @@
     }
 };
 
 } // namespace std
 
 #endif // !defined(__APPLE__) || defined(_LIBCPP_VERSION)
 
 using String = WTF::String;
 
 #endif // !defined(String16STL_h)