Correct const accessors in base/values.(h|cc)

chrome/test/webdriver/commands/cookie_commands.cc

Index: chrome/test/webdriver/commands/cookie_commands.cc
diff --git a/chrome/test/webdriver/commands/cookie_commands.cc b/chrome/test/webdriver/commands/cookie_commands.cc
index 1779d59d540d1ad9ab5ca7471d06d48752ce67ef..1227eb94d39821e9bdd917c2cf50fe2a7a25684e 100644
--- a/chrome/test/webdriver/commands/cookie_commands.cc
+++ b/chrome/test/webdriver/commands/cookie_commands.cc
@@ -17,7 +17,7 @@
 namespace webdriver {
 
 CookieCommand::CookieCommand(const std::vector<std::string>& path_segments,
-                             const DictionaryValue* const parameters)
+                             DictionaryValue* const parameters)
     : WebDriverCommand(path_segments, parameters) {}
 
 CookieCommand::~CookieCommand() {}
@@ -115,7 +115,7 @@ void CookieCommand::ExecuteDelete(Response* const response) {
 
 NamedCookieCommand::NamedCookieCommand(
     const std::vector<std::string>& path_segments,
-    const DictionaryValue* const parameters)
+    DictionaryValue* const parameters)
     : WebDriverCommand(path_segments, parameters) {}
 
 NamedCookieCommand::~NamedCookieCommand() {}