Add libjpeg-turbo library (depends on yasm)
Mangle external function names to avoid conflict with libjpeg
Take advantage of direct color conversion (RGBA, BGRA, 565)
Prepare to use jpeg_skip_scanlines (when it is upstreamed)

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/b60c3f8291529303299262dba19b1a896060bd2d

Committed: https://skia.googlesource.com/skia/+/f8bf9181d7b0463c8e371755cfbb9ece90b34fc5

Committed: https://skia.googlesource.com/skia/+/e9e3ee33f30c14c31afd5fc3fe4dda7f15783c75

Committed: https://skia.googlesource.com/skia/+/40141b57f061fbfcc2fa38da942d9efe25aca4d0

Review URL: https://codereview.chromium.org/1180983002
diff --git a/src/codec/SkJpegCodec.h b/src/codec/SkJpegCodec.h
index f39bc49..122c6e4 100644
--- a/src/codec/SkJpegCodec.h
+++ b/src/codec/SkJpegCodec.h
@@ -106,6 +106,13 @@
     bool handleRewind();
 
     /*
+     * Checks if the conversion between the input image and the requested output
+     * image has been implemented
+     * Sets the output color space
+     */
+    bool setOutputColorSpace(const SkImageInfo& dst);
+
+    /*
      * Checks if we can scale to the requested dimensions and scales the dimensions
      * if possible
      */
@@ -118,8 +125,6 @@
             const Options& options);
 
     SkAutoTDelete<JpegDecoderMgr> fDecoderMgr;
-    SkAutoTDelete<SkSwizzler>     fSwizzler;
-    size_t                        fSrcRowBytes;
 
     friend class SkJpegScanlineDecoder;