Re-enable imageresizetiled, but skip it in tilegrid and rtree.

This change makes kSkipTiled_Flag also skip --tileGrid and --rtree.
All GMs which were passing kSkipTiled_Flag before were also passing
kSkipPicture_Flag, which also skips tilegrid and rtree, so this should
have no effect on them, but provides a smaller hammer for GMs which
still want to test picture playback, but not tiling.

The exception is magnifier, which was passing only kSkipTiled_Flag,
but magnifier is an odd beast and not web-exposed, so I'm not worried
about reducing its coverage slightly.

R=scroggo@google.com
BUG=skia:

Review URL: https://codereview.chromium.org/165723009

git-svn-id: http://skia.googlecode.com/svn/trunk@13514 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/gmmain.cpp b/gm/gmmain.cpp
index d6457ab..c52c5d8 100644
--- a/gm/gmmain.cpp
+++ b/gm/gmmain.cpp
@@ -1610,7 +1610,8 @@
 
     if (FLAGS_rtree) {
         const char renderModeDescriptor[] = "-rtree";
-        if (gmFlags & GM::kSkipPicture_Flag) {
+        if ((gmFlags & GM::kSkipPicture_Flag) ||
+            (gmFlags & GM::kSkipTiled_Flag)) {
             gmmain.RecordTestResults(kIntentionallySkipped_ErrorType, shortNamePlusConfig,
                                      renderModeDescriptor);
             errorsForAllModes.add(kIntentionallySkipped_ErrorType);
@@ -1636,6 +1637,7 @@
             }
 
             if ((gmFlags & GM::kSkipPicture_Flag) ||
+                (gmFlags & GM::kSkipTiled_Flag) ||
                 ((gmFlags & GM::kSkipScaledReplay_Flag) && replayScale != 1)) {
                 gmmain.RecordTestResults(kIntentionallySkipped_ErrorType, shortNamePlusConfig,
                                          renderModeDescriptor.c_str());