Re-enable EXT_TILE unit tests

This patch fixed the issue in single tile decoding case, and
re-enabled all EXT_TILE unit tests.

BUG=aomedia:1242

Change-Id: I9ca1dbd6f9f4d731a80548d816b6c34bcc99ef91
diff --git a/av1/av1_dx_iface.c b/av1/av1_dx_iface.c
index c7f7409..8861409 100644
--- a/av1/av1_dx_iface.c
+++ b/av1/av1_dx_iface.c
@@ -463,6 +463,12 @@
     frame_worker_data->pbi->inspect_ctx = ctx->inspect_ctx;
 #endif
 
+#if CONFIG_EXT_TILE
+    frame_worker_data->pbi->common.large_scale_tile = ctx->tile_mode;
+    frame_worker_data->pbi->dec_tile_row = ctx->decode_tile_row;
+    frame_worker_data->pbi->dec_tile_col = ctx->decode_tile_col;
+#endif  // CONFIG_EXT_TILE
+
     worker->had_error = 0;
     winterface->execute(worker);
 
diff --git a/test/av1_ext_tile_test.cc b/test/av1_ext_tile_test.cc
index 899bdb3..9aa3d75 100644
--- a/test/av1_ext_tile_test.cc
+++ b/test/av1_ext_tile_test.cc
@@ -188,7 +188,7 @@
   std::vector<std::string> tile_md5_;
 };
 
-TEST_P(AV1ExtTileTest, DISABLED_DecoderResultTest) {
+TEST_P(AV1ExtTileTest, DecoderResultTest) {
   ::libaom_test::I420VideoSource video("hantro_collage_w352h288.yuv", kImgWidth,
                                        kImgHeight, 30, 1, 0, kLimit);
   cfg_.rc_target_bitrate = 500;