Plumb overlay processing into DirectRenderer.

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 1eb0fbc2af680bdfff66211567011f46c6e0a0d7..a47dce1b884d0eb9b8d07b098b1c6066bd5f9c97 100644
--- a/cc/output/direct_renderer.cc
+++ b/cc/output/direct_renderer.cc
@@ -58,7 +58,8 @@ static gfx::Transform window_matrix(int x, int y, int width, int height) {
 namespace cc {
 
 DirectRenderer::DrawingFrame::DrawingFrame()
-    : root_render_pass(NULL),
+    : overlay_passes_in_draw_order(NULL),
+      root_render_pass(NULL),
       current_render_pass(NULL),
       current_texture(NULL),
       offscreen_context_provider(NULL) {}
@@ -133,7 +134,11 @@ DirectRenderer::DirectRenderer(RendererClient* client,
                                ResourceProvider* resource_provider)
     : Renderer(client, settings),
       output_surface_(output_surface),
-      resource_provider_(resource_provider) {}
+      resource_provider_(resource_provider),
+      overlay_processor_(
+          new OverlayProcessor(output_surface, resource_provider)) {
+  overlay_processor_->Initialize();
+}
 
 DirectRenderer::~DirectRenderer() {}
 
@@ -218,6 +223,9 @@ void DirectRenderer::DrawFrame(RenderPassList* render_passes_in_draw_order,
   frame.disable_picture_quad_image_filtering =
       disable_picture_quad_image_filtering;
 
+  if (overlay_processor_->ProcessForOverlays(render_passes_in_draw_order))
+    frame.overlay_passes_in_draw_order = render_passes_in_draw_order;
+
   EnsureBackbuffer();
 
   // Only reshape when we know we are going to draw. Otherwise, the reshape
@@ -228,6 +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->overlay_state == RenderPass::SIMPLE_OVERLAY)
+      continue;
+
     DrawRenderPass(&frame, pass);
 
     for (ScopedPtrVector<CopyOutputRequest>::iterator it =