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

chrome/test/webdriver/webdriver_util.h

 // 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.
 
 #ifndef CHROME_TEST_WEBDRIVER_WEBDRIVER_UTIL_H_
 #define CHROME_TEST_WEBDRIVER_WEBDRIVER_UTIL_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
+#include "base/values.h"
 #include "chrome/test/automation/value_conversion_traits.h"
 
 class FilePath;
 
-namespace base {
-class Value;
-}
-
 namespace webdriver {
 
 // Generates a random, 32-character hexidecimal ID.
 std::string GenerateRandomID();
 
 // Returns the equivalent JSON string for the given value.
 std::string JsonStringify(const base::Value* value);
 
+// Returns the string representation of the given type, for display purposes.
+const char* GetJsonTypeName(base::Value::Type type);
+
 #if defined(OS_MACOSX)
 // Gets the paths to the user and local application directory.
 void GetApplicationDirs(std::vector<FilePath>* app_dirs);
 #endif
 
 // Parses a given value.
 class ValueParser {
  public:
   virtual ~ValueParser();
   virtual bool Parse(base::Value* value) const = 0;
@@ skipping 39 matching lines @@
 
 // Value conversion traits for SkipParsing, which just return true.
 template <>
 struct ValueConversionTraits<webdriver::SkipParsing> {
   static bool SetFromValue(const base::Value* value,
                            const webdriver::SkipParsing* t);
   static bool CanConvert(const base::Value* value);
 };
 
 #endif  // CHROME_TEST_WEBDRIVER_WEBDRIVER_UTIL_H_