Implement SharedQuadStateList StructTraits

components/mus/public/cpp/surfaces/tests/surface_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
 
 #include "cc/quads/debug_border_draw_quad.h"
@@ skipping 134 matching lines @@
 
 TEST_F(SurfaceLibQuadTest, TextureQuadEmptyVertexOpacity) {
   DrawQuadPtr mus_texture_quad = DrawQuad::New();
   mus_texture_quad->material = cc::mojom::Material::TEXTURE_CONTENT;
   TextureQuadStatePtr mus_texture_state = TextureQuadState::New();
   mus_texture_quad->texture_quad_state = std::move(mus_texture_state);
   RenderPassPtr mus_pass = RenderPass::New();
   mus_pass->id.layer_id = 1;
   mus_pass->id.index = 1u;
   mus_pass->quads.push_back(std::move(mus_texture_quad));
-  mus_pass->shared_quad_states.push_back(cc::SharedQuadState());
+  mus_pass->shared_quad_states.AllocateAndConstruct<cc::SharedQuadState>();
 
   std::unique_ptr<cc::RenderPass> pass =
       mus_pass.To<std::unique_ptr<cc::RenderPass>>();
 
   EXPECT_FALSE(pass);
 }
 
 TEST(SurfaceLibTest, RenderPass) {
   std::unique_ptr<cc::RenderPass> pass = cc::RenderPass::Create();
   cc::RenderPassId pass_id(1, 6);
@@ skipping 157 matching lines @@
   EXPECT_EQ(needs_blending, mus_quad->needs_blending);
   ASSERT_TRUE(mus_quad->debug_border_quad_state);
   DebugBorderQuadStatePtr& mus_debug_border_state =
       mus_quad->debug_border_quad_state;
   EXPECT_EQ(arbitrary_color, mus_debug_border_state->color);
   EXPECT_EQ(width, mus_debug_border_state->width);
 }
 
 }  // namespace
 }  // namespace mojo