modules/video_processing: refactor interface->include + more.

webrtc/modules/video_processing/test/writeYUV420file.m

 function writeYUV420file(filename, Y, U, V)
 % writeYUV420file(filename, Y, U, V)
 
 fid = fopen(filename,'wb');
 if fid==-1
     error(['Cannot open file ' filename]);
 end
 
 numFrames=size(Y,3);
 
 for k=1:numFrames
    % Write luminance
    fwrite(fid,uint8(Y(:,:,k).'), 'uchar');
-   
+
    % Write U channel
    fwrite(fid,uint8(U(:,:,k).'), 'uchar');
-   
+
    % Write V channel
    fwrite(fid,uint8(V(:,:,k).'), 'uchar');
 end
 
 fclose(fid);