Implement DrawQuad StructTraits

cc/quads/render_pass.h

Index: cc/quads/render_pass.h
diff --git a/cc/quads/render_pass.h b/cc/quads/render_pass.h
index 9c6bb598735b1036242788c14ea424a16e98f40b..052a83311c4f7b1f754d53ef0d42e4d1aa6b8cc8 100644
--- a/cc/quads/render_pass.h
+++ b/cc/quads/render_pass.h
@@ -16,6 +16,8 @@
 #include "base/macros.h"
 #include "cc/base/cc_export.h"
 #include "cc/base/list_container.h"
+#include "cc/quads/draw_quad.h"
+#include "cc/quads/largest_draw_quad.h"
 #include "cc/quads/render_pass_id.h"
 #include "cc/surfaces/surface_id.h"
 #include "ui/gfx/geometry/rect.h"
@@ -37,8 +39,9 @@ class RenderPassDrawQuad;
 class SharedQuadState;
 
 // A list of DrawQuad objects, sorted internally in front-to-back order.
-class QuadList : public ListContainer<DrawQuad> {
+class CC_EXPORT QuadList : public ListContainer<DrawQuad> {
  public:
+  QuadList();
   explicit QuadList(size_t default_size_to_reserve);
 
   typedef QuadList::ReverseIterator BackToFrontIterator;