[DevTools] Move IO and Tracing to new generator.

content/browser/devtools/protocol_string.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 CONTENT_BROWSER_DEVTOOLS_PROTOCOL_STRING_H
 #define CONTENT_BROWSER_DEVTOOLS_PROTOCOL_STRING_H
 
 #include <memory>
 #include <string>
 
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "content/common/content_export.h"
 
+namespace base {
+class Value;
+}
+
 namespace content {
 namespace protocol {
 
 class Value;
 
 using String = std::string;
 
 class CONTENT_EXPORT StringBuilder {
  public:
   StringBuilder();
@@ skipping 10 matching lines @@
 
 class CONTENT_EXPORT StringUtil {
  public:
   static String substring(const String& s, unsigned pos, unsigned len) {
     return s.substr(pos, len);
   }
   static String fromInteger(int number) {
     return base::IntToString(number);
   }
   static String fromDouble(double number) {
-    return base::DoubleToString(number);
+    String s = base::DoubleToString(number);
+    if (!s.empty() && s[0] == '.')
+      s = "0" + s;
+    return s;
   }
   static const size_t kNotFound = static_cast<size_t>(-1);
   static void builderReserve(StringBuilder& builder, unsigned capacity) {
     builder.reserveCapacity(capacity);
   }
   static std::unique_ptr<protocol::Value> parseJSON(const String&);
 };
 
+std::unique_ptr<protocol::Value> toProtocolValue(
+    const base::Value* value, int depth);
+std::unique_ptr<base::Value> toBaseValue(protocol::Value* value, int depth);
+
 }  // namespace protocol
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_PROTOCOL_STRING_H