Small improvements to SkBitSet:

src/utils/SkBitSet.h

Index: src/utils/SkBitSet.h
diff --git a/src/utils/SkBitSet.h b/src/utils/SkBitSet.h
index e113fd70044eb148302977ae70728565f6931426..266fd87496255ec1d2f9a528933ae0bbc32b96f3 100644
--- a/src/utils/SkBitSet.h
+++ b/src/utils/SkBitSet.h
@@ -30,11 +30,22 @@ public:
 
     /** Set the value of the index-th bit.
      */
-    void setBit(int index, bool value);
+    void setBit(int index, bool value) {
+        uint32_t mask = 1 << (index & 31);
+        uint32_t* chunk = this->internalGet(index);
+        if (value) {
+            *chunk |= mask;
+        } else {
+            *chunk &= ~mask;
+        }
+    }
 
     /** Test if bit index is set.
      */
-    bool isBitSet(int index) const;
+    bool isBitSet(int index) const {
+        uint32_t mask = 1 << (index & 31);
+        return SkToBool(*this->internalGet(index) & mask);
+    }
 
     /** Or bits from source.  false is returned if this doesn't have the same
      *  bit count as source.