Go from a 1x2 to a 2x2 dither cell, and change/simplify the logic for how we
compute the "dithered" version of a color to just a graduated fixed-point-round.
Also, add this new dither to conical and sweep, which before had no dithering.

Disabled for now using SK_IGNORE_GRADIENT_DITHER_FIX. Will enable this and
and rebaseline skia.

http://code.google.com/p/skia/issues/detail?id=1098
Review URL: https://codereview.appspot.com/7248046

git-svn-id: http://skia.googlecode.com/svn/trunk@7549 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/gradients/SkRadialGradient.cpp b/src/effects/gradients/SkRadialGradient.cpp
index 328fe76..fdca340 100644
--- a/src/effects/gradients/SkRadialGradient.cpp
+++ b/src/effects/gradients/SkRadialGradient.cpp
@@ -335,8 +335,7 @@
         if (count) {
             UNPINNED_RADIAL_STEP;
         }
-    }
-    else  {
+    } else  {
         // Specializing for dy == 0 gains us 25% on Skia benchmarks
         if (dy == 0) {
             unsigned yy = SkPin32(fy, -0xFFFF >> 1, 0xFFFF >> 1);