setPreviewCallback  293 media/base/android/java/src/org/chromium/media/VideoCapture.java     abstract void setPreviewCallback(Camera.PreviewCallback cb);
setPreviewCallback  175 media/base/android/java/src/org/chromium/media/VideoCaptureAndroid.java     protected void setPreviewCallback(Camera.PreviewCallback cb) {
setPreviewCallback  106 media/base/android/java/src/org/chromium/media/VideoCaptureTango.java     protected void setPreviewCallback(Camera.PreviewCallback cb) {