[WIP] Implement BackGroundFilter as seperate layer in cc

cc/quads/render_pass.cc

Index: cc/quads/render_pass.cc
diff --git a/cc/quads/render_pass.cc b/cc/quads/render_pass.cc
index 43bb7cd1aedd6ec0daf2ccce5454c328f95b416d..8d30b316f4e8fe724d886261e6b4a7a5027a6704 100644
--- a/cc/quads/render_pass.cc
+++ b/cc/quads/render_pass.cc
@@ -12,6 +12,7 @@
 #include "cc/quads/checkerboard_draw_quad.h"
 #include "cc/quads/debug_border_draw_quad.h"
 #include "cc/quads/draw_quad.h"
+#include "cc/quads/filter_draw_quad.h"
 #include "cc/quads/io_surface_draw_quad.h"
 #include "cc/quads/picture_draw_quad.h"
 #include "cc/quads/render_pass_draw_quad.h"
@@ -219,6 +220,9 @@ DrawQuad* RenderPass::CopyFromAndAppendDrawQuad(
     case DrawQuad::DEBUG_BORDER:
       CopyFromAndAppendTypedDrawQuad<DebugBorderDrawQuad>(quad);
       break;
+    case DrawQuad::FILTER_CONTENT:
+      CopyFromAndAppendTypedDrawQuad<FilterDrawQuad>(quad);
+      break;
     case DrawQuad::IO_SURFACE_CONTENT:
       CopyFromAndAppendTypedDrawQuad<IOSurfaceDrawQuad>(quad);
       break;