This CL implements the Ganesh path for the SkTable_ColorFilter color transformation.

A new texture stage dedicated to color transforms has been added, along with the new custom stage implementing the LUT.
Review URL: https://codereview.appspot.com/6351081

git-svn-id: http://skia.googlecode.com/svn/trunk@4663 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/gpu/GrPaint.h b/include/gpu/GrPaint.h
index 8b1bf2c..fc2fce5 100644
--- a/include/gpu/GrPaint.h
+++ b/include/gpu/GrPaint.h
@@ -24,7 +24,7 @@
 class GrPaint {
 public:
     enum {
-        kMaxTextures = 1,
+        kMaxTextures = 2,
         kMaxMasks    = 1,
     };