Move SkPackBits to src/effects.

src/effects/SkPackBits.cpp

Index: src/effects/SkPackBits.cpp
diff --git a/src/core/SkPackBits.cpp b/src/effects/SkPackBits.cpp
similarity index 93%
rename from src/core/SkPackBits.cpp
rename to src/effects/SkPackBits.cpp
index a3424e2bdcbe5cd13b0816d07869ad1c2af24b27..286d9d140c23635f3fcf4cbe241a93e2dc40f1a1 100644
--- a/src/core/SkPackBits.cpp
+++ b/src/effects/SkPackBits.cpp
@@ -6,14 +6,14 @@
  */
 #include "SkPackBits.h"
 
-size_t SkPackBits::ComputeMaxSize8(int count) {
+size_t SkPackBits::ComputeMaxSize8(size_t srcSize) {
     // worst case is the number of 8bit values + 1 byte per (up to) 128 entries.
-    return ((count + 127) >> 7) + count;
+    return ((srcSize + 127) >> 7) + srcSize;
 }
 
 static uint8_t* flush_same8(uint8_t dst[], uint8_t value, size_t count) {
     while (count > 0) {
-        int n = count > 128 ? 128 : count;
+        size_t n = count > 128 ? 128 : count;
         *dst++ = (uint8_t)(n - 1);
         *dst++ = (uint8_t)value;
         count -= n;
@@ -24,7 +24,7 @@ static uint8_t* flush_same8(uint8_t dst[], uint8_t value, size_t count) {
 static uint8_t* flush_diff8(uint8_t* SK_RESTRICT dst,
                             const uint8_t* SK_RESTRICT src, size_t count) {
     while (count > 0) {
-        int n = count > 128 ? 128 : count;
+        size_t n = count > 128 ? 128 : count;
         *dst++ = (uint8_t)(n + 127);
         memcpy(dst, src, n);
         src += n;
@@ -78,8 +78,6 @@ size_t SkPackBits::Pack8(const uint8_t* SK_RESTRICT src, size_t srcSize,
     return dst - origDst;
 }
 
-#include "SkUtils.h"
-
 int SkPackBits::Unpack8(const uint8_t* SK_RESTRICT src, size_t srcSize,
                         uint8_t* SK_RESTRICT dst, size_t dstSize) {
     uint8_t* const origDst = dst;