Templatize SkToXXX.

include/core/SkString.h

Index: include/core/SkString.h
diff --git a/include/core/SkString.h b/include/core/SkString.h
index 42466af80bfc9191d4bc960423238892f6cec79f..1c3ee3a20c22979e7409eab9f4ab5b337e6e7155 100644
--- a/include/core/SkString.h
+++ b/include/core/SkString.h
@@ -36,13 +36,13 @@ int SkStrStartsWithOneOf(const char string[], const char prefixes[]);
 static int SkStrFind(const char string[], const char substring[]) {
     const char *first = strstr(string, substring);
     if (NULL == first) return -1;
-    return SkToS32(first - &string[0]);
+    return SkToInt(first - &string[0]);
 }
 
 static int SkStrFindLastOf(const char string[], const char subchar) {
     const char* last = strrchr(string, subchar);
     if (NULL == last) return -1;
-    return SkToS32(last - &string[0]);
+    return SkToInt(last - &string[0]);
 }
 
 static bool SkStrContains(const char string[], const char substring[]) {