Missed this flag.  imagemagnifier asserts without it.

BUG=skia:781
R=epoger@google.com

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/89533004

git-svn-id: http://skia.googlecode.com/svn/trunk@12441 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/dm/DMTileGridTask.cpp b/dm/DMTileGridTask.cpp
index 5c0aaad..cd3c7b7 100644
--- a/dm/DMTileGridTask.cpp
+++ b/dm/DMTileGridTask.cpp
@@ -71,6 +71,9 @@
     if (fGM->getFlags() & skiagm::GM::kSkipPicture_Flag) {
         return true;
     }
+    if (fGM->getFlags() & skiagm::GM::kSkipTiled_Flag) {
+        return true;
+    }
     return !FLAGS_tileGrid;
 }