Fix SkIStream nits.

include/utils/win/SkIStream.h

Index: include/utils/win/SkIStream.h
diff --git a/include/utils/win/SkIStream.h b/include/utils/win/SkIStream.h
index e2c2b966fbd7450968fc75d5f77e48a301112402..9e04b7e4724ca8d9bf781959eafeb8049450f048 100644
--- a/include/utils/win/SkIStream.h
+++ b/include/utils/win/SkIStream.h
@@ -75,12 +75,12 @@ public:
 };
 
 /**
- * A minimal read-only IStream implementation which wraps an SkIStream.
+ * A minimal read-only IStream implementation which wraps an SkStream.
  */
 class SkIStream : public SkBaseIStream {
 private:
     SkStream *fSkStream;
-    bool fDeleteOnRelease;
+    const bool fDeleteOnRelease;
     ULARGE_INTEGER fLocation;
 
     SkIStream(SkStream* stream, bool fDeleteOnRelease);