Force use of and cache render surface.

cc/quads/render_pass.cc

Index: cc/quads/render_pass.cc
diff --git a/cc/quads/render_pass.cc b/cc/quads/render_pass.cc
index 3ad5fb0cf83c75a8c94f6fcd8f8c9365c0b17791..e1880de62c1cbe9e2210b37bfc9e74a562ff6801 100644
--- a/cc/quads/render_pass.cc
+++ b/cc/quads/render_pass.cc
@@ -68,17 +68,17 @@ RenderPass::RenderPass()
 // is a good hint for what to reserve here.
 RenderPass::RenderPass(size_t num_layers)
     : has_transparent_background(true),
+      force_render_surface(false),
       quad_list(kDefaultNumQuadsToReserve),
-      shared_quad_state_list(sizeof(SharedQuadState), num_layers) {
-}
+      shared_quad_state_list(sizeof(SharedQuadState), num_layers) {}
 
 RenderPass::RenderPass(size_t shared_quad_state_list_size,
                        size_t quad_list_size)
     : has_transparent_background(true),
+      force_render_surface(false),
       quad_list(quad_list_size),
       shared_quad_state_list(sizeof(SharedQuadState),
-                             shared_quad_state_list_size) {
-}
+                             shared_quad_state_list_size) {}
 
 RenderPass::~RenderPass() {
   TRACE_EVENT_OBJECT_DELETED_WITH_ID(
@@ -91,7 +91,7 @@ std::unique_ptr<RenderPass> RenderPass::Copy(int new_id) const {
       Create(shared_quad_state_list.size(), quad_list.size()));
   copy_pass->SetAll(new_id, output_rect, damage_rect, transform_to_root_target,
                     filters, background_filters, color_space,
-                    has_transparent_background);
+                    has_transparent_background, force_render_surface);
   return copy_pass;
 }
 
@@ -104,7 +104,7 @@ std::unique_ptr<RenderPass> RenderPass::DeepCopy() const {
       Create(shared_quad_state_list.size(), quad_list.size()));
   copy_pass->SetAll(id, output_rect, damage_rect, transform_to_root_target,
                     filters, background_filters, color_space,
-                    has_transparent_background);
+                    has_transparent_background, force_render_surface);
   for (auto* shared_quad_state : shared_quad_state_list) {
     SharedQuadState* copy_shared_quad_state =
         copy_pass->CreateAndAppendSharedQuadState();
@@ -167,7 +167,8 @@ void RenderPass::SetAll(int id,
                         const FilterOperations& filters,
                         const FilterOperations& background_filters,
                         const gfx::ColorSpace& color_space,
-                        bool has_transparent_background) {
+                        bool has_transparent_background,
+                        bool force_render_surface) {
   DCHECK(id);
 
   this->id = id;
@@ -178,6 +179,7 @@ void RenderPass::SetAll(int id,
   this->background_filters = background_filters;
   this->color_space = color_space;
   this->has_transparent_background = has_transparent_background;
+  this->force_render_surface = force_render_surface;
 
   DCHECK(quad_list.empty());
   DCHECK(shared_quad_state_list.empty());
@@ -188,6 +190,7 @@ void RenderPass::AsValueInto(base::trace_event::TracedValue* value) const {
   MathUtil::AddToTracedValue("damage_rect", damage_rect, value);
 
   value->SetBoolean("has_transparent_background", has_transparent_background);
+  value->SetBoolean("force_render_surface", force_render_surface);
   value->SetInteger("copy_requests",
                     base::saturated_cast<int>(copy_requests.size()));