Enhance and refactor ChromeDriver's capability handling. Log warning for

chrome/test/webdriver/webdriver_util.cc

 // Copyright (c) 2011 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 "chrome/test/webdriver/webdriver_util.h"
 
 #include "base/basictypes.h"
 #include "base/format_macros.h"
 #include "base/json/json_writer.h"
 #include "base/rand_util.h"
 #include "base/stringprintf.h"
-#include "base/values.h"
+
+using base::Value;
 
 namespace webdriver {
 
 SkipParsing* kSkipParsing = NULL;
 
 std::string GenerateRandomID() {
   uint64 msb = base::RandUint64();
   uint64 lsb = base::RandUint64();
   return base::StringPrintf("%016" PRIx64 "%016" PRIx64, msb, lsb);
 }
 
 std::string JsonStringify(const Value* value) {
   std::string json;
   base::JSONWriter::Write(value, false, &json);
   return json;
 }
 
+const char* GetJsonTypeName(Value::Type type) {
+  switch (type) {
+    case Value::TYPE_NULL:
+      return "null";
+    case Value::TYPE_BOOLEAN:
+      return "boolean";
+    case Value::TYPE_INTEGER:
+      return "integer";
+    case Value::TYPE_DOUBLE:
+      return "double";
+    case Value::TYPE_STRING:
+      return "string";
+    case Value::TYPE_BINARY:
+      return "binary";
+    case Value::TYPE_DICTIONARY:
+      return "dictionary";
+    case Value::TYPE_LIST:
+      return "list";
+  }
+  return "unknown";
+}
+
 ValueParser::ValueParser() { }
 
 ValueParser::~ValueParser() { }
 
 }  // namespace webdriver
 
 bool ValueConversionTraits<webdriver::SkipParsing>::SetFromValue(
     const base::Value* value, const webdriver::SkipParsing* t) {
   return true;
 }
 
 bool ValueConversionTraits<webdriver::SkipParsing>::CanConvert(
     const base::Value* value) {
   return true;
 }