Start of hardware overlay support in CC with Ubercompositor.

cc/quads/render_pass.cc

 // Copyright 2011 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 "cc/quads/render_pass.h"
 
 #include "base/values.h"
 #include "cc/base/math_util.h"
 #include "cc/debug/traced_value.h"
 #include "cc/output/copy_output_request.h"
@@ skipping 17 matching lines @@
 scoped_ptr<RenderPass> RenderPass::Create() {
   return make_scoped_ptr(new RenderPass());
 }
 
 scoped_ptr<RenderPass> RenderPass::Create(size_t num_layers) {
   return make_scoped_ptr(new RenderPass(num_layers));
 }
 
 RenderPass::RenderPass()
     : id(Id(-1, -1)),
-      has_transparent_background(true) {
+      has_transparent_background(true),
+      overlay_state(NO_OVERLAY) {
   shared_quad_state_list.reserve(kDefaultNumSharedQuadStatesToReserve);
   quad_list.reserve(kDefaultNumQuadsToReserve);
 }
 
 RenderPass::RenderPass(size_t num_layers)
     : id(Id(-1, -1)),
-      has_transparent_background(true) {
+      has_transparent_background(true),
+      overlay_state(NO_OVERLAY) {
   // Each layer usually produces one shared quad state, so the number of layers
   // is a good hint for what to reserve here.
   shared_quad_state_list.reserve(num_layers);
   quad_list.reserve(kDefaultNumQuadsToReserve);
 }
 
 RenderPass::~RenderPass() {
   TRACE_EVENT_OBJECT_DELETED_WITH_ID(
       TRACE_DISABLED_BY_DEFAULT("cc.debug.quads"),
       "cc::RenderPass", id.AsTracingId());
@@ skipping 106 matching lines @@
   }
   value->Set("quad_list", quad_list_value.release());
 
   TracedValue::MakeDictIntoImplicitSnapshotWithCategory(
       TRACE_DISABLED_BY_DEFAULT("cc.debug.quads"),
       value.get(), "cc::RenderPass", id.AsTracingId());
   return value.PassAs<base::Value>();
 }
 
 }  // namespace cc