cc::SharedQuadState: drop CopyFrom and add copy constructor

cc/quads/render_pass.cc

 // Copyright 2011 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 "cc/quads/render_pass.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 94 matching lines @@
     std::unique_ptr<RenderPass> copy_pass(Create(
         source->shared_quad_state_list.size(), source->quad_list.size()));
     copy_pass->SetAll(source->id,
                       source->output_rect,
                       source->damage_rect,
                       source->transform_to_root_target,
                       source->has_transparent_background);
     for (const auto& shared_quad_state : source->shared_quad_state_list) {
       SharedQuadState* copy_shared_quad_state =
           copy_pass->CreateAndAppendSharedQuadState();
-      copy_shared_quad_state->CopyFrom(shared_quad_state);
+      *copy_shared_quad_state = *shared_quad_state;
     }
     SharedQuadStateList::Iterator sqs_iter =
         source->shared_quad_state_list.begin();
     SharedQuadStateList::Iterator copy_sqs_iter =
         copy_pass->shared_quad_state_list.begin();
     for (const auto& quad : source->quad_list) {
       while (quad->shared_quad_state != *sqs_iter) {
         ++sqs_iter;
         ++copy_sqs_iter;
         DCHECK(sqs_iter != source->shared_quad_state_list.end());
@@ skipping 128 matching lines @@
     case DrawQuad::RENDER_PASS:
     case DrawQuad::INVALID:
       LOG(FATAL) << "Invalid DrawQuad material " << quad->material;
       break;
   }
   quad_list.back()->shared_quad_state = shared_quad_state;
   return quad_list.back();
 }
 
 }  // namespace cc