Make saving files from flash less annoying.

chrome/browser/file_select_helper.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/file_select_helper.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/file_util.h"
@@ skipping 373 matching lines @@
     case FileChooserParams::OpenFolder:
       dialog_type_ = SelectFileDialog::SELECT_FOLDER;
       break;
     case FileChooserParams::Save:
       dialog_type_ = SelectFileDialog::SELECT_SAVEAS_FILE;
       break;
     default:
       dialog_type_ = SelectFileDialog::SELECT_OPEN_FILE;  // Prevent warning.
       NOTREACHED();
   }
-  FilePath default_file_name = params.default_file_name;
-  if (default_file_name.empty())
-    default_file_name = profile_->last_selected_directory();
+
+  FilePath default_file_name = params.default_file_name.IsAbsolute() ?
+      params.default_file_name :
+      profile_->last_selected_directory().Append(params.default_file_name);
 
   gfx::NativeWindow owning_window =
       platform_util::GetTopLevel(render_view_host_->GetView()->GetNativeView());
 
   select_file_dialog_->SelectFile(
       dialog_type_,
       params.title,
       default_file_name,
       select_file_types_.get(),
       select_file_types_.get() ? 1 : 0,  // 1-based index.
@@ skipping 66 matching lines @@
   // A 1 character accept type will always be invalid (either a "." in the case
   // of an extension or a "/" in the case of a MIME type).
   std::string unused;
   if (accept_type.length() <= 1 ||
       StringToLowerASCII(accept_type) != accept_type ||
       TrimWhitespaceASCII(accept_type, TRIM_ALL, &unused) != TRIM_NONE) {
     return false;
   }
   return true;
 }