Bug 1599971 - part 5: Mark TextControlState::UnbindFromFrame() as MOZ_CAN_RUN_SCRIPT r=m_kato,emilio

Note that `TextControlState::BindToFrame()` may also run script if it's
called without script blocker.  However, it shouldn't occur.  Therefore,
we don't need to mark it `MOZ_CAN_RUN_SCRIPT`, but we should check
script blocker existence with `MOZ_ASSERT`.

Differential Revision: https://phabricator.services.mozilla.com/D55776

dom/html/HTMLInputElement.cpp

@@ -2260,6 +2260,7 @@ nsFrameSelection* HTMLInputElement::GetConstFrameSelection() {
 }
 
 nsresult HTMLInputElement::BindToFrame(nsTextControlFrame* aFrame) {
+  MOZ_ASSERT(!nsContentUtils::IsSafeToRunScript());
   TextControlState* state = GetEditorState();
   if (state) {
     return state->BindToFrame(aFrame);