Rename daala_read_tree_cdf() to daala_read_symbol().

Change-Id: I35f85bad88c637cea62577c546cdd5ced0e21bd6
diff --git a/aom_dsp/bitreader.h b/aom_dsp/bitreader.h
index a021fe6..6489bd7 100644
--- a/aom_dsp/bitreader.h
+++ b/aom_dsp/bitreader.h
@@ -137,7 +137,7 @@
   (void)nsymbs;
   return rans_read(r, cdf);
 #elif CONFIG_DAALA_EC
-  return daala_read_tree_cdf(r, cdf, nsymbs);
+  return daala_read_symbol(r, cdf, nsymbs);
 #else
   (void)r;
   (void)cdf;
diff --git a/aom_dsp/daalaboolreader.h b/aom_dsp/daalaboolreader.h
index 326d46d..32ef19b 100644
--- a/aom_dsp/daalaboolreader.h
+++ b/aom_dsp/daalaboolreader.h
@@ -67,8 +67,8 @@
   return -i;
 }
 
-static INLINE int daala_read_tree_cdf(daala_reader *r, const uint16_t *cdf,
-                                      int nsymbs) {
+static INLINE int daala_read_symbol(daala_reader *r, const uint16_t *cdf,
+                                    int nsymbs) {
   return od_ec_decode_cdf_q15(&r->ec, cdf, nsymbs, "aom");
 }