Merge "a window could get stuck to gpu composition"

        mActiveBuffer = mSurfaceTexture->getCurrentBuffer();

        mFrameLatencyNeeded = true;

        if (oldActiveBuffer == NULL && mActiveBuffer != NULL) {

            // the first time we receive a buffer, we need to trigger a

            // geometry invalidation.

            mFlinger->invalidateHwcGeometry();

        }

        const Rect crop(mSurfaceTexture->getCurrentCrop());

        const uint32_t transform(mSurfaceTexture->getCurrentTransform());

        const uint32_t scalingMode(mSurfaceTexture->getCurrentScalingMode());