Mac: make save/open dialogs operate as tab-modal sheets....

chrome/browser/download/download_manager.cc

Index: chrome/browser/download/download_manager.cc
diff --git a/chrome/browser/download/download_manager.cc b/chrome/browser/download/download_manager.cc
index b9925e73c0ab5a130fb8e9363e8a18b32c908b6b..5a4b6492a1d6df08d127b0f5d6f1d4a38174b4e7 100644
--- a/chrome/browser/download/download_manager.cc
+++ b/chrome/browser/download/download_manager.cc
@@ -679,13 +679,30 @@ void DownloadManager::OnPathExistenceAvailable(DownloadCreateInfo* info) {
     if (!file_type_info.extensions[0][0].empty())
       file_type_info.extensions[0][0].erase(0, 1);  // drop the .
     file_type_info.include_all_files = true;
+#if defined(OS_MACOSX)
+    // If |contents| is NULL, file selection should theoretically run modeless.
+    // FIXME(viettrungluu@gmail.com): But we don't actually currently support
+    // modeless file selection dialogs on Mac. Does this ever happen? Should it?
+    // Better dcheck it.
+    DCHECK(contents);
+    select_file_dialog_->SelectFileInTab(SelectFileDialog::SELECT_SAVEAS_FILE,
+                                         string16(),
+                                         info->suggested_path,
+                                         &file_type_info,
+                                         0,
+                                         FILE_PATH_LITERAL(""),
+                                         contents,
+                                         info);
+#else
     gfx::NativeWindow owning_window =
-        contents ? platform_util::GetTopLevel(contents->GetNativeView()) : NULL;
+        contents ? platform_util::GetTopLevel(contents->GetNativeView()) : NULL
+
     select_file_dialog_->SelectFile(SelectFileDialog::SELECT_SAVEAS_FILE,
                                     string16(),
                                     info->suggested_path,
                                     &file_type_info, 0, FILE_PATH_LITERAL(""),
                                     owning_window, info);
+#endif
   } else {
     // No prompting for download, just continue with the suggested name.
     ContinueStartDownload(info, info->suggested_path);