Not for review.

cc/output/direct_renderer.cc

Index: cc/output/direct_renderer.cc
diff --git a/cc/output/direct_renderer.cc b/cc/output/direct_renderer.cc
index c077ffe21ae3c16d1409c1e11cb794ede263360d..3df00624d65e8d7e787d83630634a280029bdc3c 100644
--- a/cc/output/direct_renderer.cc
+++ b/cc/output/direct_renderer.cc
@@ -10,9 +10,11 @@
 #include "base/containers/hash_tables.h"
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/debug/trace_event.h"
+#include "base/debug/stack_trace.h"
 #include "base/metrics/histogram.h"
 #include "cc/base/math_util.h"
 #include "cc/output/copy_output_request.h"
+#include "cc/output/overlay_renderer.h"
 #include "cc/quads/draw_quad.h"
 #include "ui/gfx/rect_conversions.h"
 #include "ui/gfx/transform.h"
@@ -132,7 +134,10 @@ DirectRenderer::DirectRenderer(RendererClient* client,
                                ResourceProvider* resource_provider)
     : Renderer(client, settings),
       output_surface_(output_surface),
-      resource_provider_(resource_provider) {}
+      resource_provider_(resource_provider) {
+  overlay_renderer_.reset(new OverlayRenderer());
+  overlay_renderer_->Initialize();
+}
 
 DirectRenderer::~DirectRenderer() {}
 
@@ -203,6 +208,8 @@ void DirectRenderer::DrawFrame(RenderPassList* render_passes_in_draw_order,
   UMA_HISTOGRAM_COUNTS("Renderer4.renderPassCount",
                        render_passes_in_draw_order->size());
 
+  overlay_renderer_->ProcessForOverlays(render_passes_in_draw_order);
+
   const RenderPass* root_render_pass = render_passes_in_draw_order->back();
   DCHECK(root_render_pass);
 
@@ -229,6 +236,9 @@ void DirectRenderer::DrawFrame(RenderPassList* render_passes_in_draw_order,
   BeginDrawingFrame(&frame);
   for (size_t i = 0; i < render_passes_in_draw_order->size(); ++i) {
     RenderPass* pass = render_passes_in_draw_order->at(i);
+    if (!pass->should_render) {
+      continue;
+    }
     DrawRenderPass(&frame, pass, allow_partial_swap);
 
     for (ScopedPtrVector<CopyOutputRequest>::iterator it =
@@ -244,8 +254,6 @@ void DirectRenderer::DrawFrame(RenderPassList* render_passes_in_draw_order,
     }
   }
   FinishDrawingFrame(&frame);
-
-  render_passes_in_draw_order->clear();
 }
 
 gfx::RectF DirectRenderer::ComputeScissorRectForRenderPass(