Fix a concurrency bug that ends up in a crash.

        }

        // This never calls InputConnection#getCapsMode - in fact, it's a static method that

        // never blocks or initiates IPC.

        return CapsModeUtils.getCapsMode(mCommittedTextBeforeComposingText, inputType,

        // TODO: don't call #toString() here. Instead, all accesses to

        // mCommittedTextBeforeComposingText should be done on the main thread.

        return CapsModeUtils.getCapsMode(mCommittedTextBeforeComposingText.toString(), inputType,

                spacingAndPunctuations, hasSpaceBefore);

    }