Replace unique_ptr.reset(other_unique_ptr.release()) with std::move() in cc/trees/

cc/trees/layer_tree_impl_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 "cc/trees/layer_tree_impl.h"
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "cc/layers/heads_up_display_layer_impl.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
@@ skipping 1055 matching lines @@
     grand_child->SetPosition(gfx::PointF(0.f, 40.f));
     grand_child->SetBounds(gfx::Size(100, 50));
     grand_child->SetDrawsContent(true);
     grand_child->test_properties()->force_render_surface = true;
 
     // This should let |grand_child| "escape" |child|'s clip.
     grand_child->test_properties()->clip_parent = root;
     std::unique_ptr<std::set<LayerImpl*>> clip_children(
         new std::set<LayerImpl*>);
     clip_children->insert(grand_child.get());
-    root->test_properties()->clip_children.reset(clip_children.release());
+    root->test_properties()->clip_children = std::move(clip_children);
 
     child->test_properties()->AddChild(std::move(grand_child));
     root->test_properties()->AddChild(std::move(child));
   }
 
   host_impl().SetViewportSize(root->bounds());
   host_impl().UpdateNumChildrenAndDrawPropertiesForActiveTree();
 
   gfx::PointF test_point(12.f, 52.f);
   LayerImpl* result_layer =
@@ skipping 1314 matching lines @@
     auto weak_promise = promise->AsWeakPtr();
     host_impl().active_tree()->QueueSwapPromise(std::move(promise));
     host_impl().active_tree()->BreakSwapPromises(
         SwapPromise::DidNotSwapReason::SWAP_FAILS);
     EXPECT_FALSE(weak_promise);
   }
 }
 
 }  // namespace
 }  // namespace cc