Assume all TURBO_HAS_* are true.

Should be everyone's on libjpeg-turbo >= 1.5.0.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2274643002

Review-Url: https://codereview.chromium.org/2274643002
diff --git a/BUILD.gn b/BUILD.gn
index ccf2e6b..692d0ba 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -68,10 +68,6 @@
 
     # TODO(halcanary): make this the default; this is the value Android uses.
     "SK_SFNTLY_SUBSETTER=\"sample/chromium/font_subsetter.h\"",
-
-    "TURBO_HAS_565",
-    "TURBO_HAS_CROP",
-    "TURBO_HAS_SKIP",
   ]
   if (is_linux) {
     defines += [ "SK_SAMPLES_FOR_X" ]
diff --git a/gyp/codec.gyp b/gyp/codec.gyp
index 4b4029b..3aaea21 100644
--- a/gyp/codec.gyp
+++ b/gyp/codec.gyp
@@ -59,13 +59,6 @@
           '../include/codec',
         ],
       },
-      'defines': [
-        # Turn on libjpeg-turbo optimizations since we know that the
-        # appropriate version of libjpeg-turbo is present.
-        'TURBO_HAS_CROP',
-        'TURBO_HAS_SKIP',
-        'TURBO_HAS_565',
-      ],
       'conditions': [
         ['skia_codec_decodes_raw', {
           'dependencies': [
diff --git a/public.bzl b/public.bzl
index 4c3e70b..39926b5 100644
--- a/public.bzl
+++ b/public.bzl
@@ -573,9 +573,6 @@
     "SK_HAS_JPEG_LIBRARY",
     "SK_HAS_PNG_LIBRARY",
     "SK_HAS_WEBP_LIBRARY",
-    "TURBO_HAS_CROP",
-    "TURBO_HAS_SKIP",
-    "TURBO_HAS_565",
 ]
 
 DEFINES_ANDROID = [
@@ -585,9 +582,6 @@
     "SK_HAS_JPEG_LIBRARY",
     "SK_HAS_PNG_LIBRARY",
     "SK_HAS_WEBP_LIBRARY",
-    "TURBO_HAS_CROP",
-    "TURBO_HAS_SKIP",
-    "TURBO_HAS_565",
 ]
 
 DEFINES_IOS = [
diff --git a/src/codec/SkJpegCodec.cpp b/src/codec/SkJpegCodec.cpp
index 05f40bd..fcf89d0 100644
--- a/src/codec/SkJpegCodec.cpp
+++ b/src/codec/SkJpegCodec.cpp
@@ -278,12 +278,8 @@
  * Return the row bytes of a particular image type and width
  */
 static size_t get_row_bytes(const j_decompress_ptr dinfo) {
-#ifdef TURBO_HAS_565
     const size_t colorBytes = (dinfo->out_color_space == JCS_RGB565) ? 2 :
             dinfo->out_color_components;
-#else
-    const size_t colorBytes = dinfo->out_color_components;
-#endif
     return dinfo->output_width * colorBytes;
 
 }
@@ -353,10 +349,6 @@
     fStorage.reset();
     fColorXform.reset(nullptr);
 
-#if !defined(TURBO_HAS_SKIP)
-    fSkipStorage.reset();
-#endif
-
     return true;
 }
 
@@ -408,12 +400,8 @@
             if (isCMYK) {
                 fDecoderMgr->dinfo()->out_color_space = JCS_CMYK;
             } else {
-#ifdef TURBO_HAS_565
                 fDecoderMgr->dinfo()->dither_mode = JDITHER_NONE;
                 fDecoderMgr->dinfo()->out_color_space = JCS_RGB565;
-#else
-                fDecoderMgr->dinfo()->out_color_space = JCS_RGB;
-#endif
             }
             return true;
         case kGray_8_SkColorType:
@@ -576,7 +564,7 @@
     SkASSERT(1 == dinfo->rec_outbuf_height);
 
     J_COLOR_SPACE colorSpace = dinfo->out_color_space;
-    if (JCS_CMYK == colorSpace || JCS_RGB == colorSpace) {
+    if (JCS_CMYK == colorSpace) {
         this->initializeSwizzler(dstInfo, options);
     }
 
@@ -621,21 +609,11 @@
     // appropriate format to the swizzler.
     SkEncodedInfo swizzlerInfo = this->getEncodedInfo();
     bool preSwizzled = true;
-    switch (fDecoderMgr->dinfo()->out_color_space) {
-        case JCS_RGB:
-            preSwizzled = false;
-            swizzlerInfo = SkEncodedInfo::Make(SkEncodedInfo::kRGB_Color,
-                                               swizzlerInfo.alpha(),
-                                               swizzlerInfo.bitsPerComponent());
-            break;
-        case JCS_CMYK:
-            preSwizzled = false;
-            swizzlerInfo = SkEncodedInfo::Make(SkEncodedInfo::kInvertedCMYK_Color,
-                                               swizzlerInfo.alpha(),
-                                               swizzlerInfo.bitsPerComponent());
-            break;
-        default:
-            break;
+    if (JCS_CMYK == fDecoderMgr->dinfo()->out_color_space) {
+        preSwizzled = false;
+        swizzlerInfo = SkEncodedInfo::Make(SkEncodedInfo::kInvertedCMYK_Color,
+                                           swizzlerInfo.alpha(),
+                                           swizzlerInfo.bitsPerComponent());
     }
 
     Options swizzlerOptions = options;
@@ -698,7 +676,6 @@
         return kInvalidInput;
     }
 
-#ifdef TURBO_HAS_CROP
     if (options.fSubset) {
         uint32_t startX = options.fSubset->x();
         uint32_t width = options.fSubset->width();
@@ -740,18 +717,6 @@
     if (!fSwizzler && JCS_CMYK == fDecoderMgr->dinfo()->out_color_space) {
         this->initializeSwizzler(dstInfo, options);
     }
-#else
-    if (options.fSubset) {
-        fSwizzlerSubset = *options.fSubset;
-    }
-
-    // We will need a swizzler if we are performing a subset decode or
-    // converting from CMYK.
-    J_COLOR_SPACE colorSpace = fDecoderMgr->dinfo()->out_color_space;
-    if (options.fSubset || JCS_CMYK == colorSpace || JCS_RGB == colorSpace) {
-        this->initializeSwizzler(dstInfo, options);
-    }
-#endif
 
     this->allocateStorage(dstInfo);
 
@@ -774,22 +739,7 @@
         return fDecoderMgr->returnFalse("onSkipScanlines");
     }
 
-#ifdef TURBO_HAS_SKIP
     return (uint32_t) count == jpeg_skip_scanlines(fDecoderMgr->dinfo(), count);
-#else
-    uint8_t* ptr = fSkipStorage.get();
-    if (!ptr) {
-        fSkipStorage.reset(get_row_bytes(fDecoderMgr->dinfo()));
-        ptr = fSkipStorage.get();
-    }
-
-    for (int y = 0; y < count; y++) {
-        if (1 != jpeg_read_scanlines(fDecoderMgr->dinfo(), &ptr, 1)) {
-            return false;
-        }
-    }
-    return true;
-#endif
 }
 
 static bool is_yuv_supported(jpeg_decompress_struct* dinfo) {
diff --git a/src/codec/SkJpegCodec.h b/src/codec/SkJpegCodec.h
index f178590..192e4be 100644
--- a/src/codec/SkJpegCodec.h
+++ b/src/codec/SkJpegCodec.h
@@ -8,13 +8,6 @@
 #ifndef SkJpegCodec_DEFINED
 #define SkJpegCodec_DEFINED
 
-// For testing.
-#ifdef SKNX_NO_SIMD
-#undef TURBO_HAS_CROP
-#undef TURBO_HAS_SKIP
-#undef TURBO_HAS_565
-#endif
-
 #include "SkCodec.h"
 #include "SkColorSpace.h"
 #include "SkColorSpaceXform.h"
@@ -145,12 +138,8 @@
 
     SkAutoTDelete<SkSwizzler>          fSwizzler;
     std::unique_ptr<SkColorSpaceXform> fColorXform;
-    
-    sk_sp<SkData>                      fICCData;
 
-#if !defined(TURBO_HAS_SKIP)
-    SkAutoTMalloc<uint8_t>             fSkipStorage;
-#endif
+    sk_sp<SkData>                      fICCData;
 
     typedef SkCodec INHERITED;
 };