cc: Move filters to the effect tree

cc/proto/property_tree.proto

Index: cc/proto/property_tree.proto
diff --git a/cc/proto/property_tree.proto b/cc/proto/property_tree.proto
index 46c9a4ae83fffa22f9e1e0728eb61a8e16371542..5880c4d7dab9c08e7d0d7fa9103f513d96f32984 100644
--- a/cc/proto/property_tree.proto
+++ b/cc/proto/property_tree.proto
@@ -86,7 +86,7 @@ message ClipNodeData {
 }
 
 // Proto for struct EffectNodeData.
-// NEXT ID: 21
+// NEXT ID: 23
 message EffectNodeData {
   optional float opacity = 1;
   optional float screen_space_opacity = 2;
@@ -96,7 +96,9 @@ message EffectNodeData {
   optional bool double_sided = 13;
   optional bool is_drawn = 6;
   optional bool subtree_hidden = 15;
+  optional bool has_potential_filter_animation = 21;
   optional bool has_potential_opacity_animation = 7;
+  optional bool is_currently_animating_filter = 22;

[jaydasika, 2016/07/20 21:00:36]

Since filters and background filters are no longer in LayerImpl, I think the
TODO in layer.proto to add support to filters can move to this file ?

[ajuma, 2016/07/21 16:42:18]

Copied the TODO. I think the one in layer.proto is still needed, given that
Blimp is serializing Layers but not property trees (so filters will still need
to be serialized with Layers).

   optional bool is_currently_animating_opacity = 16;
   optional bool effect_changed = 11;
   optional int64 num_copy_requests_in_subtree = 8;