[cc] A few tracing fixes

Resolutions AsValue did not recognize NON_IDEAL_RESOLUTION

Call rate of PictureLayerTiling::UpdateTilePriorities is very high. Dont trace it.

R=ccameron
BUG=176150

Review URL: https://codereview.chromium.org/12253021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@182398 0039d316-1c4b-4281-b951-d872f2087c98

cc/picture_layer_tiling.cc

@@ -361,7 +361,6 @@ void PictureLayerTiling::UpdateTilePriorities(
     int current_source_frame_number,
     double current_frame_time,
     bool store_screen_space_quads_on_tiles) {
-  TRACE_EVENT0("cc", "PictureLayerTiling::UpdateTilePriorities");
   if (ContentRect().IsEmpty())
     return;
 

cc/tile_priority.cc

@@ -80,6 +80,9 @@ scoped_ptr<base::Value> TileResolutionAsValue(
   case HIGH_RESOLUTION:
     return scoped_ptr<base::Value>(base::Value::CreateStringValue(
         "HIGH_RESOLUTION"));
+  case NON_IDEAL_RESOLUTION:
+      return scoped_ptr<base::Value>(base::Value::CreateStringValue(
+        "NON_IDEAL_RESOLUTION"));
   default:
     DCHECK(false) << "Unrecognized TileResolution value";
     return scoped_ptr<base::Value>(base::Value::CreateStringValue(