Change dialog texts for folder upload to explicitly indicate it's for 'Uploading'

ui/shell_dialogs/select_file_dialog_mac.mm

Index: ui/shell_dialogs/select_file_dialog_mac.mm
diff --git a/ui/shell_dialogs/select_file_dialog_mac.mm b/ui/shell_dialogs/select_file_dialog_mac.mm
index 15113184ca7b425b878a3c0c726690fc92b11ac3..f3affe834b183f836e19c5f7b225cc6342b62e21 100644
--- a/ui/shell_dialogs/select_file_dialog_mac.mm
+++ b/ui/shell_dialogs/select_file_dialog_mac.mm
@@ -178,6 +178,7 @@ void SelectFileDialogImpl::SelectFileImpl(
     gfx::NativeWindow owning_window,
     void* params) {
   DCHECK(type == SELECT_FOLDER ||
+         type == SELECT_UPLOAD_FOLDER ||
          type == SELECT_OPEN_FILE ||
          type == SELECT_OPEN_MULTI_FILE ||
          type == SELECT_SAVEAS_FILE);
@@ -274,11 +275,13 @@ void SelectFileDialogImpl::SelectFileImpl(
     else
       [open_dialog setAllowsMultipleSelection:NO];
 
-    if (type == SELECT_FOLDER) {
+    if (type == SELECT_FOLDER || type == SELECT_UPLOAD_FOLDER) {
       [open_dialog setCanChooseFiles:NO];
       [open_dialog setCanChooseDirectories:YES];
       [open_dialog setCanCreateDirectories:YES];
-      NSString *prompt = l10n_util::GetNSString(IDS_SELECT_FOLDER_BUTTON_TITLE);
+      NSString *prompt = (type == SELECT_UPLOAD_FOLDER)
+          ? l10n_util::GetNSString(IDS_SELECT_UPLOAD_FOLDER_BUTTON_TITLE)
+          : l10n_util::GetNSString(IDS_SELECT_FOLDER_BUTTON_TITLE);
       [open_dialog setPrompt:prompt];
     } else {
       [open_dialog setCanChooseFiles:YES];