Make CanPlayType return "probably" for HI10P h264 videos.

media/base/mime_util_internal.h

Index: media/base/mime_util_internal.h
diff --git a/media/base/mime_util_internal.h b/media/base/mime_util_internal.h
index 815d1cb79d0c044670fb967f1e04e3831d006c7e..6331a70dab7b1e5bb03c88dfb6289e995ae638ba 100644
--- a/media/base/mime_util_internal.h
+++ b/media/base/mime_util_internal.h
@@ -117,9 +117,11 @@ class MEDIA_EXPORT MimeUtil {
   // |is_ambiguous| is true if |codec_id| did not have enough information to
   // unambiguously determine the proper Codec enum value. If |is_ambiguous|
   // is true |codec| contains the best guess for the intended Codec enum value.
+  // |is_encrypted| means the codec will be used with encrypted blocks.
   bool StringToCodec(const std::string& codec_id,
                      Codec* codec,
-                     bool* is_ambiguous) const;
+                     bool* is_ambiguous,
+                     bool is_encrypted) const;
 
   // Returns true if |codec| is supported when contained in
   // |mime_type_lower_case|. Note: This method will always return false for