Reland of: cc: Add occlusion checker as a fixed view of occlusion tracker.

cc/resources/picture_layer_tiling.h

Index: cc/resources/picture_layer_tiling.h
diff --git a/cc/resources/picture_layer_tiling.h b/cc/resources/picture_layer_tiling.h
index 35bbf94a297847aa6122f1d870bccb603ae092bb..df0bceda3b675cdd0a54a07f36e85b470459bc8d 100644
--- a/cc/resources/picture_layer_tiling.h
+++ b/cc/resources/picture_layer_tiling.h
@@ -17,6 +17,7 @@
 #include "cc/base/tiling_data.h"
 #include "cc/resources/tile.h"
 #include "cc/resources/tile_priority.h"
+#include "cc/trees/occlusion_checker.h"
 #include "ui/gfx/rect.h"
 
 namespace base {
@@ -27,8 +28,6 @@ class TracedValue;
 
 namespace cc {
 
-template <typename LayerType>
-class OcclusionTracker;
 class PictureLayerTiling;
 class PicturePileImpl;
 
@@ -242,9 +241,7 @@ class CC_EXPORT PictureLayerTiling {
       const gfx::Rect& visible_layer_rect,
       float ideal_contents_scale,
       double current_frame_time_in_seconds,
-      const OcclusionTracker<LayerImpl>* occlusion_tracker,
-      const LayerImpl* render_target,
-      const gfx::Transform& draw_transform);
+      const OcclusionChecker<LayerImpl>& occlusion_checker_in_layer_space);
 
   // Copies the src_tree priority into the dst_tree priority for all tiles.
   // The src_tree priority is reset to the lowest priority possible.  This