When the download folder does not exist, change the download folder to a user's "Downloads"

chrome/browser/download/download_file_manager.cc

Index: chrome/browser/download/download_file_manager.cc
diff --git a/chrome/browser/download/download_file_manager.cc b/chrome/browser/download/download_file_manager.cc
index 16a0ac7654cae56b255f287419e9a943f59f48ef..5e1ae3decff9e24c343f6da4dc45e6be08886015 100644
--- a/chrome/browser/download/download_file_manager.cc
+++ b/chrome/browser/download/download_file_manager.cc
@@ -13,6 +13,7 @@
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/download/download_create_info.h"
 #include "chrome/browser/download/download_manager.h"
+#include "chrome/browser/download/download_prefs.h"
 #include "chrome/browser/download/download_request_handle.h"
 #include "chrome/browser/download/download_util.h"
 #include "chrome/browser/net/chrome_url_request_context.h"
@@ -56,9 +57,9 @@ void DownloadFileManager::OnShutdown() {
   STLDeleteValues(&downloads_);
 }
 
-void DownloadFileManager::CreateDownloadFile(DownloadCreateInfo* info,
-                                             DownloadManager* download_manager,
-                                             bool get_hash) {
+void DownloadFileManager::CreateDownloadFile(
+    DownloadCreateInfo* info, DownloadManager* download_manager,
+    bool get_hash, const FilePath& default_download_dir) {
   DCHECK(info);
   VLOG(20) << __FUNCTION__ << "()" << " info = " << info->DebugString();
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
@@ -68,7 +69,7 @@ void DownloadFileManager::CreateDownloadFile(DownloadCreateInfo* info,
 
   scoped_ptr<DownloadFile>
       download_file(new DownloadFile(info, download_manager));
-  if (!download_file->Initialize(get_hash)) {
+  if (!download_file->Initialize(get_hash, default_download_dir)) {
     info->request_handle.CancelRequest();
     return;
   }
@@ -146,10 +147,13 @@ void DownloadFileManager::StartDownload(DownloadCreateInfo* info) {
 
   bool hash_needed = g_browser_process->safe_browsing_service()->
       DownloadBinHashNeeded();
+  FilePath default_download_dir =
+      manager->download_prefs()->GetDefaultDownloadDirectory();
 
   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
       NewRunnableMethod(this, &DownloadFileManager::CreateDownloadFile,
-                        info, make_scoped_refptr(manager), hash_needed));
+                        info, make_scoped_refptr(manager),
+                        hash_needed, default_download_dir));
 }
 
 // We don't forward an update to the UI thread here, since we want to throttle
@@ -274,7 +278,7 @@ void DownloadFileManager::OnDownloadManagerShutdown(DownloadManager* manager) {
 //
 // There are 2 possible rename cases where this method can be called:
 // 1. tmp -> foo.crdownload (not final, safe)
-// 2. tmp-> Unconfirmed.xxx.crdownload (not final, dangerous)
+// 2. tmp -> Unconfirmed.xxx.crdownload (not final, dangerous)
 void DownloadFileManager::RenameInProgressDownloadFile(
     int id, const FilePath& full_path) {
   VLOG(20) << __FUNCTION__ << "()" << " id = " << id