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

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

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/api/downloads/downloads_api.h"
 
 #include <algorithm>
 #include <cctype>
 #include <iterator>
 #include <set>
@@ skipping 560 matching lines @@
   const extensions::api::downloads::DownloadOptions& options = params->options;
   GURL download_url(options.url);
   if (!download_url.is_valid() ||
       (!download_url.SchemeIs("data") &&
        download_url.GetOrigin() != GetExtension()->url().GetOrigin() &&
        !GetExtension()->HasHostPermission(download_url))) {
     error_ = download_extension_errors::kInvalidURLError;
     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
     // converts it from std::string.
     base::DictionaryValue* options_value = NULL;
     EXTENSION_FUNCTION_VALIDATE(args_->GetDictionary(0, &options_value));
     string16 filename16;
     EXTENSION_FUNCTION_VALIDATE(options_value->GetString(
         kFilenameKey, &filename16));
     if (!ValidateFilename(filename16)) {
       error_ = download_extension_errors::kGenericError;
       return false;
     }
     // 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())
     current_profile = profile()->GetOffTheRecordProfile();
 
   scoped_ptr<content::DownloadUrlParameters> download_params(
       new content::DownloadUrlParameters(
           download_url,
           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;
     for (std::vector<linked_ptr<HeaderNameValuePair> >::const_iterator iter =
          options.headers->begin();
          iter != options.headers->end();
          ++iter) {
       const HeaderNameValuePair& name_value = **iter;
       if (!net::HttpUtil::IsSafeHeader(name_value.name)) {
         error_ = download_extension_errors::kGenericError;
@@ skipping 385 matching lines @@
   if (profile_->HasOffTheRecordProfile() &&
       !profile_->IsOffTheRecord()) {
     DispatchEventInternal(
         profile_->GetOffTheRecordProfile(),
         event_name,
         json_args,
         scoped_ptr<base::ListValue>(args->DeepCopy()));
   }
   DispatchEventInternal(profile_, event_name, json_args, args.Pass());
 }