Force use of and cache render surface.

cc/ipc/struct_traits_unittest.cc

Index: cc/ipc/struct_traits_unittest.cc
diff --git a/cc/ipc/struct_traits_unittest.cc b/cc/ipc/struct_traits_unittest.cc
index dc5d9cbe56c97eecdeab77266cb1e704533e3ca1..d04e2f554bff173f5291ecf135e427b10c6d2625 100644
--- a/cc/ipc/struct_traits_unittest.cc
+++ b/cc/ipc/struct_traits_unittest.cc
@@ -841,7 +841,7 @@ TEST_F(StructTraitsTest, RenderPass) {
   std::unique_ptr<RenderPass> input = RenderPass::Create();
   input->SetAll(render_pass_id, output_rect, damage_rect, transform_to_root,
                 filters, background_filters, color_space,
-                has_transparent_background);
+                has_transparent_background, false, false);

[vmpstr, 2017/07/13 18:01:02]

Can you please add bools for this right above, so that it's clear what each
parameter presents?

[wutao, 2017/07/14 00:02:53]

Done.

 
   SharedQuadState* shared_state_1 = input->CreateAndAppendSharedQuadState();
   shared_state_1->SetAll(
@@ -958,7 +958,7 @@ TEST_F(StructTraitsTest, RenderPassWithEmptySharedQuadStateList) {
   std::unique_ptr<RenderPass> input = RenderPass::Create();
   input->SetAll(render_pass_id, output_rect, damage_rect, transform_to_root,
                 FilterOperations(), FilterOperations(), color_space,
-                has_transparent_background);
+                has_transparent_background, false, false);

[vmpstr, 2017/07/13 18:01:02]

same here.

[wutao, 2017/07/14 00:02:53]

Done.

 
   // Unlike the previous test, don't add any quads to the list; we need to
   // verify that the serialization code can deal with that.