Call scoped_refptr<T>::get() rather than relying on implicit "operator T*"

chrome/common/extensions/extension_set.h

Index: chrome/common/extensions/extension_set.h
diff --git a/chrome/common/extensions/extension_set.h b/chrome/common/extensions/extension_set.h
index 74d13bf3413e56bf09be489e8ccd77ecf3ed7c5f..7e09c149f3218c9967a41a2d9bff481582ca4400 100644
--- a/chrome/common/extensions/extension_set.h
+++ b/chrome/common/extensions/extension_set.h
@@ -61,6 +61,9 @@ class ExtensionSet {
     const scoped_refptr<const extensions::Extension> operator*() {
       return it_->second;
     }
+    const scoped_refptr<const extensions::Extension>* operator->() {
+      return &it_->second;
+    }
     bool operator!=(const const_iterator& other) { return it_ != other.it_; }
     bool operator==(const const_iterator& other) { return it_ == other.it_; }