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

chrome/browser/ui/webui/about_ui.cc

Index: chrome/browser/ui/webui/about_ui.cc
diff --git a/chrome/browser/ui/webui/about_ui.cc b/chrome/browser/ui/webui/about_ui.cc
index b0e9c872c1aac996d40efd6315656bbf5ed6b2ba..4d23d5011c1180690e462b9c59f3f0b5aa300637 100644
--- a/chrome/browser/ui/webui/about_ui.cc
+++ b/chrome/browser/ui/webui/about_ui.cc
@@ -855,10 +855,11 @@ std::string AboutStats(const std::string& query) {
       // as well.
       for (int index = static_cast<int>(timers->GetSize())-1; index >= 0;
            index--) {
-        Value* value;
+        scoped_ptr<Value> value;
         timers->Remove(index, &value);
         // We don't care about the value pointer; it's still tracked
         // on the counters list.
+        ignore_result(value.release());
       }
     }
   }