Propagate supported scanout formats from driver to SurfaceFactoryOzone.

ui/ozone/public/surface_factory_ozone.h

Index: ui/ozone/public/surface_factory_ozone.h
diff --git a/ui/ozone/public/surface_factory_ozone.h b/ui/ozone/public/surface_factory_ozone.h
index eaa353b4bf8db598168199960735463547cf7420..ae87c0f7ff88315ccc37f98720b5ebddc81e18ea 100644
--- a/ui/ozone/public/surface_factory_ozone.h
+++ b/ui/ozone/public/surface_factory_ozone.h
@@ -100,6 +100,12 @@ class OZONE_BASE_EXPORT SurfaceFactoryOzone {
   // caller. desired_list contains list of desired EGL properties and values.
   virtual const int32_t* GetEGLSurfaceProperties(const int32_t* desired_list);
 
+  // Returns all formats which can be scanned out by this PlaneManager for the
+  // specified gfx::AcceleratedWidget. Be careful that secondary device may not
+  // have all the formats of the primary device.

[kalyank, 2016/01/22 06:41:25]

Nit: I think you can remove the comment about secondary device as we now check
for the display controller to which |window| is associated and return the
formats supported by it. Also, PlaneManager is bit confusing here and everywhere
else, comments similar to what we have for CreateNativePixmap below should be
good ?

[william.xie, 2016/01/23 01:51:53]

Done.

+  virtual std::vector<gfx::BufferFormat> GetScanoutFormats(
+      gfx::AcceleratedWidget widget);
+
   // Create a single native buffer to be used for overlay planes or zero copy
   // for |widget| representing a particular display controller or default
   // display controller for kNullAcceleratedWidget.