Shift passage of FileStream in downloads system to be by scoped_ptr<>.

chrome/browser/extensions/api/downloads/downloads_api.cc

Index: chrome/browser/extensions/api/downloads/downloads_api.cc
diff --git a/chrome/browser/extensions/api/downloads/downloads_api.cc b/chrome/browser/extensions/api/downloads/downloads_api.cc
index eb18822cf04f497497626e513326a484444c5062..5645a53ed2e52c660b808b4891065e93c4238d61 100644
--- a/chrome/browser/extensions/api/downloads/downloads_api.cc
+++ b/chrome/browser/extensions/api/downloads/downloads_api.cc
@@ -578,7 +578,8 @@ bool DownloadsDownloadFunction::RunImpl() {
     return false;
   }
 
-  content::DownloadSaveInfo save_info;
+  scoped_ptr<content::DownloadSaveInfo> save_info(
+      new content::DownloadSaveInfo());
   if (options.filename.get()) {
     // TODO(benjhayden): Make json_schema_compiler generate string16s instead of
     // std::strings. Can't get filename16 from options.ToValue() because that
@@ -594,11 +595,11 @@ bool DownloadsDownloadFunction::RunImpl() {
     }
     // TODO(benjhayden) Ensure that this filename is interpreted as a path
     // relative to the default downloads directory without allowing '..'.
-    save_info.suggested_name = filename16;
+    save_info->suggested_name = filename16;
   }
 
   if (options.save_as.get())
-    save_info.prompt_for_save_location = *options.save_as.get();
+    save_info->prompt_for_save_location = *options.save_as.get();
 
   Profile* current_profile = profile();
   if (include_incognito() && profile()->HasOffTheRecordProfile())
@@ -610,7 +611,7 @@ bool DownloadsDownloadFunction::RunImpl() {
           render_view_host()->GetProcess()->GetID(),
           render_view_host()->GetRoutingID(),
           current_profile->GetResourceContext(),
-          save_info));
+          save_info.Pass()));
 
   if (options.headers.get()) {
     typedef extensions::api::downloads::HeaderNameValuePair HeaderNameValuePair;