cc: Add tile-free software compositing mode.

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index a96608952e5dde5824227e42ee3184b2f741a01e..e815571a39c2910d7c2ee9042029610de54db305 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -142,7 +142,9 @@ class LayerTreeHostImplTimeSourceAdapter : public TimeSourceClient {
 };
 
 LayerTreeHostImpl::FrameData::FrameData()
-    : contains_incomplete_tile(false), has_no_damage(false) {}
+    : contains_incomplete_tile(false),
+      has_no_damage(false),
+      cannot_append_tile_draw_quads(false) {}
 
 LayerTreeHostImpl::FrameData::~FrameData() {}
 
@@ -606,6 +608,8 @@ bool LayerTreeHostImpl::CalculateRenderPasses(FrameData* frame) {
     occlusion_tracker.EnterLayer(it, prevent_occlusion);
 
     AppendQuadsData append_quads_data(target_render_pass->id);
+    append_quads_data.cannot_append_tile_draw_quads =
+        frame->cannot_append_tile_draw_quads;
 
     if (it.represents_target_render_surface()) {
       if (it->HasRequestCopyCallback()) {
@@ -1390,9 +1394,12 @@ bool LayerTreeHostImpl::InitializeRenderer(
                                    resource_provider.get(),
                                    settings_.highp_threshold_min);
   } else if (output_surface->software_device()) {
+    ResourceProvider* software_resource_provider = NULL;

[kaanb1, 2013/04/29 16:56:26]

nit: consider s/software_resource_provider/resource_provider_for_software/
Right now it reads like as if we have a provider for software resources.

[aelias_OOO_until_Jul13, 2013/04/30 07:28:20]

Deleted this code anyway.

+    if (!settings().tile_free_software_compositing)
+      software_resource_provider = resource_provider.get();
     renderer_ = SoftwareRenderer::Create(this,
                                          output_surface.get(),
-                                         resource_provider.get());
+                                         software_resource_provider);
   }
   if (!renderer_)
     return false;