Switched to JDCT_ISLOW for Android.

Source/platform/image-decoders/jpeg/JPEGImageDecoder.cpp

Index: Source/platform/image-decoders/jpeg/JPEGImageDecoder.cpp
diff --git a/Source/platform/image-decoders/jpeg/JPEGImageDecoder.cpp b/Source/platform/image-decoders/jpeg/JPEGImageDecoder.cpp
index 5da5d357157ecd6047d9358012230ff7a20178f6..ea4385b33397d8665a40e27c86261de37b679f4c 100644
--- a/Source/platform/image-decoders/jpeg/JPEGImageDecoder.cpp
+++ b/Source/platform/image-decoders/jpeg/JPEGImageDecoder.cpp
@@ -75,13 +75,17 @@ inline bool colorSpaceHasAlpha(J_COLOR_SPACE) { return false; }
 #endif
 
 #if USE(LOW_QUALITY_IMAGE_NO_JPEG_DITHERING)
-inline J_DCT_METHOD dctMethod() { return JDCT_IFAST; }
 inline J_DITHER_MODE ditherMode() { return JDITHER_NONE; }
 #else
-inline J_DCT_METHOD dctMethod() { return JDCT_ISLOW; }
 inline J_DITHER_MODE ditherMode() { return JDITHER_FS; }
 #endif
 
+#if USE(LOW_QUALITY_IMAGE_FAST_JPEG_DCT)

[Peter Kasting, 2014/06/17 17:49:04]

If nobody uses this, I'd scrap it and add a comment here about why we always
want JDCT_ISLOW.

[Ken Russell (switch to Gerrit), 2014/06/17 21:28:35]

Agree with this comment.

+inline J_DCT_METHOD dctMethod() { return JDCT_IFAST; }
+#else
+inline J_DCT_METHOD dctMethod() { return JDCT_ISLOW; }
+#endif
+
 #if USE(LOW_QUALITY_IMAGE_NO_JPEG_FANCY_UPSAMPLING)
 inline bool doFancyUpsampling() { return false; }
 #else