cc: Stop pushing properties every activation for picture 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 3dbce3cb6dab0bb1327dfb34bb0811fbccc7b8b6..04aee7313d5f84df46b8d8494bb46450550d82e9 100644
--- a/cc/layers/picture_layer_impl.cc
+++ b/cc/layers/picture_layer_impl.cc
@@ -143,11 +143,6 @@ void PictureLayerImpl::PushPropertiesTo(LayerImpl* base_layer) {
   layer_impl->low_res_raster_contents_scale_ = low_res_raster_contents_scale_;
 
   layer_impl->SanityCheckTilingState();
-
-  // We always need to push properties.
-  // See http://crbug.com/303943
-  // TODO(danakj): Stop always pushing properties since we don't swap tilings.
-  needs_push_properties_ = true;
 }
 
 void PictureLayerImpl::AppendQuads(RenderPass* render_pass,
@@ -562,6 +557,10 @@ void PictureLayerImpl::UpdateRasterSource(
   if (could_have_tilings != can_have_tilings)
     layer_tree_impl()->set_needs_update_draw_properties();
 
+  // SetNeedsPushProperties when changing the raster source. This shouldn't
+  // imply damage but need to be synced.
+  SetNeedsPushProperties();
+
   if (!can_have_tilings) {
     RemoveAllTilings();
     return;
@@ -656,6 +655,12 @@ bool PictureLayerImpl::RequiresHighResToDraw() const {
   return layer_tree_impl()->RequiresHighResToDraw();
 }
 
+void PictureLayerImpl::TilingLiveRectChanged() {
+  // SetNeedsPushProperties when the live rect changes, as there are new tiles
+  // on the tree. This shouldn't imply damage but need to be synced.
+  SetNeedsPushProperties();
+}
+
 gfx::Size PictureLayerImpl::CalculateTileSize(
     const gfx::Size& content_bounds) const {
   int max_texture_size =