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

chrome/test/webdriver/commands/set_timeout_commands.h

Index: chrome/test/webdriver/commands/set_timeout_commands.h
diff --git a/chrome/test/webdriver/commands/set_timeout_commands.h b/chrome/test/webdriver/commands/set_timeout_commands.h
index de7a7c13951ff377a436e279ce9dcf0e797087a4..492e81fa0e4cfa154c994bbf7e14dec0eff54b8d 100644
--- a/chrome/test/webdriver/commands/set_timeout_commands.h
+++ b/chrome/test/webdriver/commands/set_timeout_commands.h
@@ -21,7 +21,7 @@ class Response;
 class SetTimeoutCommand : public WebDriverCommand {
  public:
   SetTimeoutCommand(const std::vector<std::string>& path_segments,
-                    const base::DictionaryValue* const parameters);
+                    base::DictionaryValue* const parameters);
   virtual ~SetTimeoutCommand();
 
   virtual bool DoesPost() OVERRIDE;
@@ -36,7 +36,7 @@ class SetTimeoutCommand : public WebDriverCommand {
 class SetAsyncScriptTimeoutCommand : public SetTimeoutCommand {
  public:
   SetAsyncScriptTimeoutCommand(const std::vector<std::string>& path_segments,
-                               const base::DictionaryValue* const parameters);
+                               base::DictionaryValue* const parameters);
   virtual ~SetAsyncScriptTimeoutCommand();
   virtual void SetTimeout(int timeout_ms) OVERRIDE;
 
@@ -48,7 +48,7 @@ class SetAsyncScriptTimeoutCommand : public SetTimeoutCommand {
 class ImplicitWaitCommand : public SetTimeoutCommand {
  public:
   ImplicitWaitCommand(const std::vector<std::string>& path_segments,
-                      const base::DictionaryValue* const parameters);
+                      base::DictionaryValue* const parameters);
   virtual ~ImplicitWaitCommand();
   virtual void SetTimeout(int timeout_ms) OVERRIDE;