pass cap to dash text

src/core/SkScalerContext.h

Index: src/core/SkScalerContext.h
diff --git a/src/core/SkScalerContext.h b/src/core/SkScalerContext.h
index 9249bfb2a9dd1cffef099f5148259c587ac55f1e..f2df93cef31ad611c79fd8bf3f9c003778753829 100644
--- a/src/core/SkScalerContext.h
+++ b/src/core/SkScalerContext.h
@@ -79,7 +79,8 @@ struct SkScalerContextRec {
     }
 
     uint8_t     fMaskFormat;
-    uint8_t     fStrokeJoin;
+    uint8_t     fStrokeJoin : 4;
+    uint8_t     fStrokeCap : 4;

[bungeman-skia, 2016/03/09 15:32:57]

This is a cool way to get these bits in, though it would be nice to point out
that these are actually 2 bits each  (there are only three values for each).
This would make things clearer to future bit miners. On the other hand, having

uint8_t fStronkeJoin : 2;
uint8_t fStrokeCap : 2;
uint8_t fExtraBitsThatNeedToBe0 : 4

(and needing to set the 0 bits to 0 in MakeRec) is rather ugly.

It would also be nice to assert that this is enough space (kCapCount and
kJoinCount) though I admit that the possibility of adding to those enums seems
remote.

     uint16_t    fFlags;
     // Warning: when adding members note that the size of this structure
     // must be a multiple of 4. SkDescriptor requires that its arguments be