[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 55241d0a16f4c43125e3cdb09c95a104f23b6f2f..feaaf9c7fe3e7bbbebf54599754c55846b2e6143 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,
@@ -68,6 +69,7 @@ void PictureLayer::PushPropertiesTo(LayerImpl* base_layer) {
   layer_impl->invalidation_.Clear();
   layer_impl->invalidation_.Swap(&recording_invalidation_);
   layer_impl->set_is_mask(is_mask_);
+  layer_impl->SetNearestNeighbor(nearest_neighbor_);
   scoped_refptr<RasterSource> raster_source =
       recording_source_->CreateRasterSource();
   raster_source->SetBackgoundColor(SafeOpaqueBackgroundColor());
@@ -206,6 +208,13 @@ void PictureLayer::ClearClient() {
   UpdateDrawsContent(HasDrawableContent());
 }
 
+void PictureLayer::SetNearestNeighbor(bool nearest_neighbor) {
+  if (nearest_neighbor_ != nearest_neighbor) {

[danakj, 2014/12/09 19:44:45]

if == return

[jackhou1, 2014/12/10 01:04:14]

Done.

+    nearest_neighbor_ = nearest_neighbor;
+    SetNeedsDisplay();

[danakj, 2014/12/09 19:44:45]

SetNeedsCommit is what you are looking for here

[jackhou1, 2014/12/10 01:04:14]

Done.

+  }
+}
+
 bool PictureLayer::HasDrawableContent() const {
   return client_ && Layer::HasDrawableContent();
 }