Option-click to download should not display "Save As" UI.

chrome/browser/renderer_host/resource_message_filter.cc

 // Copyright (c) 2010 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/renderer_host/resource_message_filter.h"
 
 #include "app/clipboard/clipboard.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #if defined(OS_POSIX)
@@ skipping 890 matching lines @@
 }
 
 void ResourceMessageFilter::OnForwardToWorker(const IPC::Message& message) {
   WorkerService::GetInstance()->ForwardMessage(message, this);
 }
 
 void ResourceMessageFilter::OnDownloadUrl(const IPC::Message& message,
                                           const GURL& url,
                                           const GURL& referrer) {
   URLRequestContext* context = request_context_->GetURLRequestContext();
+
+  // Don't show "Save As" UI.
+  bool prompt_for_save_location = false;
   resource_dispatcher_host_->BeginDownload(url,
                                            referrer,
                                            DownloadSaveInfo(),
+                                           prompt_for_save_location,
                                            id(),
                                            message.routing_id(),
                                            context);
 }
 
 void ResourceMessageFilter::OnClipboardWriteObjectsSync(
     const Clipboard::ObjectMap& objects,
     base::SharedMemoryHandle bitmap_handle) {
   DCHECK(base::SharedMemory::IsHandleValid(bitmap_handle))
       << "Bad bitmap handle";
@@ skipping 781 matching lines @@
   dictionary_map.insert(
       std::make_pair(ExtensionMessageBundle::kExtensionIdKey, extension_id));
 
   ViewHostMsg_GetExtensionMessageBundle::WriteReplyParams(
       reply_msg, dictionary_map);
 
   ChromeThread::PostTask(
       ChromeThread::IO, FROM_HERE,
       NewRunnableMethod(this, &ResourceMessageFilter::Send, reply_msg));
 }