Start of hardware overlay support in CC with Ubercompositor.

content/common/cc_messages.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/cc_messages.h"
 
 #include "base/command_line.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/filter_operations.h"
 #include "content/public/common/common_param_traits.h"
@@ skipping 267 matching lines @@
   for (int i = 0; i < 16; ++i) {
     if (i > 0)
       l->append(", ");
     LogParam(row_major_data[i], l);
   }
   l->append(") ");
 }
 
 void ParamTraits<cc::RenderPass>::Write(
     Message* m, const param_type& p) {
+  DCHECK(p.overlay_state == cc::RenderPass::NO_OVERLAY);
   WriteParam(m, p.id);
   WriteParam(m, p.output_rect);
   WriteParam(m, p.damage_rect);
   WriteParam(m, p.transform_to_root_target);
   WriteParam(m, p.has_transparent_background);
   WriteParam(m, p.shared_quad_state_list.size());
   WriteParam(m, p.quad_list.size());
 
   size_t shared_quad_state_index = 0;
   size_t last_shared_quad_state_index = kuint32max;
@@ skipping 116 matching lines @@
       !ReadParam(m, iter, &transform_to_root_target) ||
       !ReadParam(m, iter, &has_transparent_background) ||
       !ReadParam(m, iter, &shared_quad_state_list_size) ||
       !ReadParam(m, iter, &quad_list_size))
     return false;
 
   p->SetAll(id,
             output_rect,
             damage_rect,
             transform_to_root_target,
-            has_transparent_background);
+            has_transparent_background,
+            cc::RenderPass::NO_OVERLAY);
 
   size_t last_shared_quad_state_index = kuint32max;
   for (size_t i = 0; i < quad_list_size; ++i) {
     cc::DrawQuad::Material material;
     PickleIterator temp_iter = *iter;
     if (!ReadParam(m, &temp_iter, &material))
       return false;
 
     scoped_ptr<cc::DrawQuad> draw_quad;
     switch (material) {
@@ skipping 312 matching lines @@
   l->append(", [");
   for (size_t i = 0; i < p.render_pass_list.size(); ++i) {
     if (i)
       l->append(", ");
     LogParam(*p.render_pass_list[i], l);
   }
   l->append("])");
 }
 
 }  // namespace IPC