[cc] Add nearest neighbor filtering for PictureLayer.

cc/layers/picture_layer.cc

Index: cc/layers/picture_layer.cc
diff --git a/cc/layers/picture_layer.cc b/cc/layers/picture_layer.cc
index 8a4fd6713c90fb114fab36c20d3abc323230a787..48f3f7349453f7dd859bab4af70b8a635413ff84 100644
--- a/cc/layers/picture_layer.cc
+++ b/cc/layers/picture_layer.cc
@@ -24,7 +24,8 @@ PictureLayer::PictureLayer(ContentLayerClient* client)
       instrumentation_object_tracker_(id()),
       update_source_frame_number_(-1),
       can_use_lcd_text_for_update_(true),
-      is_mask_(false) {
+      is_mask_(false),
+      nearest_neighbor_(false) {
 }
 
 PictureLayer::PictureLayer(ContentLayerClient* client,
@@ -65,6 +66,8 @@ void PictureLayer::PushPropertiesTo(LayerImpl* base_layer) {
     recording_source_->SetEmptyBounds();
   }
 
+  layer_impl->SetNearestNeighbor(nearest_neighbor_);
+
   scoped_refptr<RasterSource> raster_source =
       recording_source_->CreateRasterSource();
   raster_source->SetBackgoundColor(SafeOpaqueBackgroundColor());
@@ -205,6 +208,14 @@ void PictureLayer::ClearClient() {
   UpdateDrawsContent(HasDrawableContent());
 }
 
+void PictureLayer::SetNearestNeighbor(bool nearest_neighbor) {
+  if (nearest_neighbor_ == nearest_neighbor)
+    return;
+
+  nearest_neighbor_ = nearest_neighbor;
+  SetNeedsCommit();
+}
+
 bool PictureLayer::HasDrawableContent() const {
   return client_ && Layer::HasDrawableContent();
 }