SkLiteDL: remove freelisting, add reset() and SKLITEDL_PAGE knob.

include/core/SkMath.h

Index: include/core/SkMath.h
diff --git a/include/core/SkMath.h b/include/core/SkMath.h
index 8276c5d04f1a89062e990c46174ca6aa1c22030d..6e252306df072fee76024a186bab921aa6e17941 100644
--- a/include/core/SkMath.h
+++ b/include/core/SkMath.h
@@ -90,7 +90,7 @@ static inline int SkClampMax(int value, int max) {
  *  Returns true if value is a power of 2. Does not explicitly check for
  *  value <= 0.
  */
-template <typename T> inline bool SkIsPow2(T value) {
+template <typename T> constexpr inline bool SkIsPow2(T value) {
     return (value & (value - 1)) == 0;
 }