[DevTools] Migrate v8_inspector/public from String16 to String{View,Buffer}.

third_party/WebKit/Source/platform/inspector_protocol/String16_cpp.template

 // 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 <cstdlib>
 #include <cstring>
 #include <string>
 
 namespace blink {
 namespace protocol {
@@ skipping 13 matching lines @@
 void doubleToStr3(double number, char* buffer, size_t length)
 {
     std::snprintf(buffer, length, "%.3g", number);
 }
 
 void doubleToStr6(double number, char* buffer, size_t length)
 {
     std::snprintf(buffer, length, "%.6g", number);
 }
 
-double strToDouble(const char* buffer, bool* ok)
-{
-    char* endptr;
-    double result = std::strtod(buffer, &endptr);
-    if (ok)
-        *ok = !(*endptr);
-    return result;
-}
-
 int strToInt(const char* buffer, bool* ok)
 {
     char* endptr;
     int result = std::strtol(buffer, &endptr, 10);
     if (ok)
         *ok = !(*endptr);
     return result;
 }
 
 } // namespace internal
@@ skipping 37 matching lines @@
     return String16(m_buffer.data(), m_buffer.size());
 }
 
 void String16Builder::reserveCapacity(size_t capacity)
 {
     m_buffer.reserve(capacity);
 }
 
 } // namespace protocol
 } // namespace blink