cc: Remove vectors from tiling eviction tile iterator.

cc/resources/picture_layer_tiling_set.h

Index: cc/resources/picture_layer_tiling_set.h
diff --git a/cc/resources/picture_layer_tiling_set.h b/cc/resources/picture_layer_tiling_set.h
index f19c1b875ad7f4a3e114737c29f809a1a821de7d..5bdf0fb2bc190dfa9bfb27738912877f1f2bcccb 100644
--- a/cc/resources/picture_layer_tiling_set.h
+++ b/cc/resources/picture_layer_tiling_set.h
@@ -30,6 +30,10 @@ class CC_EXPORT PictureLayerTilingSet {
   struct TilingRange {
     TilingRange(size_t start, size_t end) : start(start), end(end) {}
 
+    bool IsIndexWithinRange(size_t index) const {
+      return index >= start && index < end;
+    }
+
     size_t start;
     size_t end;
   };