cc: turn on distance field text on animated layers

cc/layers/picture_layer_impl.cc

Index: cc/layers/picture_layer_impl.cc
diff --git a/cc/layers/picture_layer_impl.cc b/cc/layers/picture_layer_impl.cc
index d31aa8c5c2b7e89d747a46b0ff690c9b901782cb..5ceb859073b13c5afa80576e56268df3d0adcdc9 100644
--- a/cc/layers/picture_layer_impl.cc
+++ b/cc/layers/picture_layer_impl.cc
@@ -483,6 +483,9 @@ void PictureLayerImpl::UpdateTiles(const Occlusion& occlusion_in_content_space,
   was_screen_space_transform_animating_ =
       draw_properties().screen_space_transform_is_animating;
 
+  if (draw_transform_is_animating())
+    pile_->set_will_be_used_for_transform_animation(true);
+
   should_update_tile_priorities_ = true;
 
   UpdateTilePriorities(occlusion_in_content_space);
@@ -1232,18 +1235,6 @@ void PictureLayerImpl::SanityCheckTilingState() const {
 }
 
 bool PictureLayerImpl::ShouldAdjustRasterScaleDuringScaleAnimations() const {
-  if (!layer_tree_impl()->use_gpu_rasterization())
-    return false;

[ajuma, 2014/10/17 13:36:24]

We still need this check, since we don't want to re-rasterize every frame when
using software rasterization.

-
-  // Re-rastering text at different scales using GPU rasterization causes
-  // texture uploads for glyphs at each scale (see crbug.com/366225). To
-  // workaround this performance issue, we don't re-rasterize layers with
-  // text during scale animations.
-  // TODO(ajuma): Remove this workaround once text can be efficiently
-  // re-rastered at different scales (e.g. by using distance-field fonts).
-  if (pile_->has_text())
-    return false;
-
   return true;
 }