[DevTools] Reduce API surface of String16.

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

Index: third_party/WebKit/Source/platform/inspector_protocol/Values.cpp
diff --git a/third_party/WebKit/Source/platform/inspector_protocol/Values.cpp b/third_party/WebKit/Source/platform/inspector_protocol/Values.cpp
index 5b8f13b4930e2716f71136b7ece01bc11f351181..33a89da25aea436d58eeee25e6c26f52ae2ae638 100644
--- a/third_party/WebKit/Source/platform/inspector_protocol/Values.cpp
+++ b/third_party/WebKit/Source/platform/inspector_protocol/Values.cpp
@@ -35,13 +35,14 @@ inline bool escapeChar(UChar c, String16Builder* dst)
     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;
     }
 }