[inspector] migrate Runtime to new style

src/inspector/string-util.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_STRINGUTIL_H_
 #define V8_INSPECTOR_STRINGUTIL_H_
 
 #include "src/base/macros.h"
 #include "src/inspector/string-16.h"
 
@@ skipping 22 matching lines @@
   static void builderReserve(StringBuilder& builder, size_t capacity) {
     builder.reserveCapacity(capacity);
   }
 };
 
 std::unique_ptr<protocol::Value> parseJSON(const StringView& json);
 std::unique_ptr<protocol::Value> parseJSON(const String16& json);
 
 }  // namespace protocol
 
-std::unique_ptr<protocol::Value> toProtocolValue(protocol::String* errorString,
-                                                 v8::Local<v8::Context>,
-                                                 v8::Local<v8::Value>,
-                                                 int maxDepth = 1000);
-
 v8::Local<v8::String> toV8String(v8::Isolate*, const String16&);
 v8::Local<v8::String> toV8StringInternalized(v8::Isolate*, const String16&);
 v8::Local<v8::String> toV8StringInternalized(v8::Isolate*, const char*);
 v8::Local<v8::String> toV8String(v8::Isolate*, const StringView&);
 // TODO(dgozman): rename to toString16.
 String16 toProtocolString(v8::Local<v8::String>);
 String16 toProtocolStringWithTypeCheck(v8::Local<v8::Value>);
 String16 toString16(const StringView&);
 StringView toStringView(const String16&);
 bool stringViewStartsWith(const StringView&, const char*);
 
 class StringBufferImpl : public StringBuffer {
  public:
   // Destroys string's content.
   static std::unique_ptr<StringBufferImpl> adopt(String16&);
   const StringView& string() override { return m_string; }
 
  private:
   explicit StringBufferImpl(String16&);
   String16 m_owner;
   StringView m_string;
 
   DISALLOW_COPY_AND_ASSIGN(StringBufferImpl);
 };
 
 }  //  namespace v8_inspector
 
 #endif  // V8_INSPECTOR_STRINGUTIL_H_