Added toString to SkDrawLooper-derived classes

https://codereview.appspot.com/7195054/



git-svn-id: http://skia.googlecode.com/svn/trunk@7422 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/core/SkStringUtils.h b/include/core/SkStringUtils.h
new file mode 100644
index 0000000..eea0b51
--- /dev/null
+++ b/include/core/SkStringUtils.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkStringUtils_DEFINED
+#define SkStringUtils_DEFINED
+
+class SkString;
+
+/**
+ * Add 'flagStr' to 'string' and set 'needSeparator' to true only if 'flag' is 
+ * true. If 'needSeparator' is true append a '|' before 'flagStr'. This method 
+ * is used to streamline the creation of ASCII flag strings within the toString 
+ * methods.
+ */
+void SkAddFlagToString(SkString* string, bool flag, 
+                       const char* flagStr, bool* needSeparator);
+
+
+#endif
\ No newline at end of file