Merge "Provide proper transform to mask canvas" into sc-dev

    if (mIsDirty) {

        SkCanvas* maskCanvas = mMaskSurface->getCanvas();

        // Make sure to apply target transformation to the mask canvas

        // to ensure the replayed drawing commands generate the same result

        auto previousMatrix = displayList->mParentMatrix;

        displayList->mParentMatrix = maskCanvas->getTotalMatrix();

        maskCanvas->save();

        maskCanvas->drawColor(0, SkBlendMode::kClear);

        TransformCanvas transformCanvas(maskCanvas, SkBlendMode::kSrcOver);

        displayList->draw(&transformCanvas);

        maskCanvas->restore();

        displayList->mParentMatrix = previousMatrix;

    }

    sk_sp<SkImage> maskImage = mMaskSurface->makeImageSnapshot();