[DevTools] Reduce API surface of String16.

third_party/WebKit/Source/platform/inspector_protocol/Values.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/Values.h"
 
 #include "platform/inspector_protocol/Parser.h"
 #include "platform/inspector_protocol/String16.h"
 
 #include <algorithm>
@@ skipping 17 matching lines @@
     case '\r': dst->append("\\r"); break;
     case '\t': dst->append("\\t"); break;
     case '\\': dst->append("\\\\"); break;
     case '"': dst->append("\\\""); break;
     default:
         return false;
     }
     return true;
 }
 
-const LChar hexDigits[17] = "0123456789ABCDEF";
+const char hexDigits[17] = "0123456789ABCDEF";
 
 void appendUnsignedAsHex(UChar number, String16Builder* dst)
 {
     dst->append("\\u");
     for (size_t i = 0; i < 4; ++i) {
-        dst->append(hexDigits[(number & 0xF000) >> 12]);
+        UChar c = hexDigits[(number & 0xF000) >> 12];
+        dst->append(c);
         number <<= 4;
     }
 }
 
 void escapeStringForJSON(const String16& str, String16Builder* dst)
 {
     for (unsigned i = 0; i < str.length(); ++i) {
         UChar c = str[i];
         if (!escapeChar(c, dst)) {
             if (c < 32 || c > 126 || c == '<' || c == '>') {
@@ skipping 346 matching lines @@
 }
 
 protocol::Value* ListValue::at(size_t index)
 {
     DCHECK_LT(index, m_data.size());
     return m_data[index].get();
 }
 
 } // namespace protocol
 } // namespace blink