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

chrome/browser/download/save_file_manager.cc

 // Copyright (c) 2011 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 "build/build_config.h"
 
 #include "chrome/browser/download/save_file_manager.h"
 
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/stl_util-inl.h"
 #include "base/string_util.h"
 #include "base/task.h"
 #include "base/threading/thread.h"
+#include "chrome/browser/download/download_manager.h"
+#include "chrome/browser/download/download_prefs.h"
 #include "chrome/browser/download/save_file.h"
 #include "chrome/browser/download/save_package.h"
 #include "chrome/browser/platform_util.h"
+#include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/tab_contents/tab_util.h"
 #include "chrome/browser/ui/download/download_tab_helper.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/common/chrome_paths.h"
 #include "content/browser/browser_thread.h"
 #include "content/browser/renderer_host/resource_dispatcher_host.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/net_util.h"
 #include "net/base/io_buffer.h"
@@ skipping 90 matching lines @@
     const GURL& url,
     const GURL& referrer,
     int render_process_host_id,
     int render_view_id,
     SaveFileCreateInfo::SaveFileSource save_source,
     const FilePath& file_full_path,
     const content::ResourceContext& context,
     SavePackage* save_package) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
+  TabContents* contents =
+      tab_util::GetTabContentsByID(render_process_host_id, render_view_id);
+  DownloadPrefs* download_prefs =
+      contents->profile()->GetDownloadManager()->download_prefs();
+  FilePath default_download_dir = download_prefs->GetDefaultDownloadDirectory();
+
   // Register a saving job.
   RegisterStartingRequest(url, save_package);
   if (save_source == SaveFileCreateInfo::SAVE_FILE_FROM_NET) {
     DCHECK(url.is_valid());
 
     BrowserThread::PostTask(
         BrowserThread::IO, FROM_HERE,
         NewRunnableMethod(this,
                           &SaveFileManager::OnSaveURL,
                           url,
                           referrer,
                           render_process_host_id,
                           render_view_id,
+                          default_download_dir,
                           &context));
   } else {
     // We manually start the save job.
     SaveFileCreateInfo* info = new SaveFileCreateInfo(file_full_path,
          url,
          save_source,
          -1);
     info->render_process_id = render_process_host_id;
     info->render_view_id = render_view_id;
 
@@ skipping 67 matching lines @@
 
 // The IO thread created |info|, but the file thread (this method) uses it
 // to create a SaveFile which will hold and finally destroy |info|. It will
 // then passes |info| to the UI thread for reporting saving status.
 void SaveFileManager::StartSave(SaveFileCreateInfo* info) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   DCHECK(info);
   SaveFile* save_file = new SaveFile(info);
 
   // TODO(phajdan.jr): We should check the return value and handle errors here.
-  save_file->Initialize(false);  // No need to calculate hash.
+  // No need to calculate hash.
+  save_file->Initialize(false, info->default_download_dir);
 
   DCHECK(!LookupSaveFile(info->save_id));
   save_file_map_[info->save_id] = save_file;
   info->path = save_file->full_path();
 
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       NewRunnableMethod(this, &SaveFileManager::OnStartSave, info));
 }
 
@@ skipping 116 matching lines @@
     save_package->SaveFailed(save_url);
 }
 
 // Notifications sent from the UI thread and run on the IO thread.
 
 void SaveFileManager::OnSaveURL(
     const GURL& url,
     const GURL& referrer,
     int render_process_host_id,
     int render_view_id,
+    const FilePath& default_download_dir,
     const content::ResourceContext* context) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   resource_dispatcher_host_->BeginSaveFile(url,
                                            referrer,
                                            render_process_host_id,
                                            render_view_id,
+                                           default_download_dir,
                                            *context);
 }
 
 void SaveFileManager::OnRequireSaveJobFromOtherSource(
     SaveFileCreateInfo* info) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   DCHECK_EQ(info->save_id, -1);
   // Generate a unique save id.
   info->save_id = GetNextId();
   // Start real saving action.
@@ skipping 151 matching lines @@
     SaveFileMap::iterator it = save_file_map_.find(*i);
     if (it != save_file_map_.end()) {
       SaveFile* save_file = it->second;
       DCHECK(!save_file->in_progress());
       file_util::Delete(save_file->full_path(), false);
       delete save_file;
       save_file_map_.erase(it);
     }
   }
 }