Make element removal methods in DictionaryValue and ListValue take scoped_ptr's as outparams.

chrome/test/webdriver/webdriver_session.cc

Index: chrome/test/webdriver/webdriver_session.cc
diff --git a/chrome/test/webdriver/webdriver_session.cc b/chrome/test/webdriver/webdriver_session.cc
index 51f901e9bc01e922e073d28149d6c6bd3d76e500..1c87b2bf5c072e9e76e0c06fe5c3136bbc867cb0 100644
--- a/chrome/test/webdriver/webdriver_session.cc
+++ b/chrome/test/webdriver/webdriver_session.cc
@@ -560,7 +560,8 @@ Error* Session::MouseDoubleClick() {
   return error;
 }
 
-Error* Session::GetCookies(const std::string& url, base::ListValue** cookies) {
+Error* Session::GetCookies(const std::string& url,
+                           scoped_ptr<base::ListValue>* cookies) {
   Error* error = NULL;
   RunSessionTask(base::Bind(
       &Automation::GetCookies,