Implements core logic for Pixel Canvas

ui/compositor/layer.cc

Index: ui/compositor/layer.cc
diff --git a/ui/compositor/layer.cc b/ui/compositor/layer.cc
index b48c8a38d70f45f8bd687dd0746ccbd777825423..18a76f58d34c64a7a5072984380e92f117f7e55d 100644
--- a/ui/compositor/layer.cc
+++ b/ui/compositor/layer.cc
@@ -921,8 +921,11 @@ scoped_refptr<cc::DisplayItemList> Layer::PaintContentsToDisplayList(
   paint_region_.Clear();
   auto display_list = make_scoped_refptr(new cc::DisplayItemList);
   if (delegate_) {
-    delegate_->OnPaintLayer(
-        PaintContext(display_list.get(), device_scale_factor_, invalidation));
+    delegate_->OnPaintLayer(PaintContext(
+        display_list.get(), device_scale_factor_,
+        gfx::ScaleToRoundedRect(invalidation, IsPixelCanvasRecordingEnabled()

[danakj, 2017/07/21 17:29:39]

Can this read the value off the compositor instead of the command line?

[malaykeshav, 2017/07/21 23:30:17]

Done

+                                                  ? device_scale_factor_
+                                                  : 1.f)));
   }
   display_list->Finalize();
   // TODO(domlaskowski): Move mirror invalidation to Layer::SchedulePaint.