Fix assert in GetOverlayRect when transforming video with Ozone overlay

ui/ozone/platform/drm/gbm_surface_factory.cc

Index: ui/ozone/platform/drm/gbm_surface_factory.cc
diff --git a/ui/ozone/platform/drm/gbm_surface_factory.cc b/ui/ozone/platform/drm/gbm_surface_factory.cc
index 8ecf724844d43f1246fd761c22ccedd8d3f05ee4..ba155bfb27c39a2bb5b8e25a6939a914ca0985ad 100644
--- a/ui/ozone/platform/drm/gbm_surface_factory.cc
+++ b/ui/ozone/platform/drm/gbm_surface_factory.cc
@@ -9,6 +9,7 @@
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "third_party/khronos/EGL/egl.h"
+#include "ui/gfx/geometry/rect_conversions.h"
 #include "ui/ozone/common/egl_util.h"
 #include "ui/ozone/platform/drm/gpu/drm_device_manager.h"
 #include "ui/ozone/platform/drm/gpu/drm_window.h"
@@ -48,7 +49,8 @@ class SingleOverlay : public OverlayCandidatesOzone {
         return;
       }
       if (overlay->plane_z_order > 0 &&
-          IsTransformSupported(overlay->transform)) {
+          IsTransformSupported(overlay->transform) &&
+          gfx::IsNearestRectWithinDistance(overlay->display_rect, 0.01f)) {

[danakj, 2015/05/04 19:56:41]

This magic number, can you leave a comment explaining it?

[halliwell, 2015/05/04 21:38:16]

Done.

         overlay->overlay_handled = true;
       }
     }