Two fixes to touch selection:

ui/views/controls/textfield/native_textfield_views.cc

Index: ui/views/controls/textfield/native_textfield_views.cc
diff --git a/ui/views/controls/textfield/native_textfield_views.cc b/ui/views/controls/textfield/native_textfield_views.cc
index cdac9ffbcb8b88b5f1326814925b78f0864d03d0..9b1f21f42064d6b80017660eb28db71f932c04cf 100644
--- a/ui/views/controls/textfield/native_textfield_views.cc
+++ b/ui/views/controls/textfield/native_textfield_views.cc
@@ -722,7 +722,7 @@ bool NativeTextfieldViews::IsCommandIdEnabled(int command_id) const {
     case IDS_APP_DELETE:
       return editable && model_->HasSelection();
     case IDS_APP_SELECT_ALL:
-      return true;
+      return !model_->GetText().empty();
     default:
       return textfield_->GetController()->IsCommandIdEnabled(command_id);
   }