cc: Make LayerTreeHostImpl::SwapBuffers not virtual.

cc/layers/surface_layer_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 <stdint.h>
 
 #include <set>
 #include <vector>
 
 #include "base/location.h"
@@ skipping 173 matching lines @@
         layer_tree_host()->SetRootLayer(blank_layer_);
         break;
       case 2:
         break;
       default:
         NOTREACHED();
         break;
     }
   }
 
-  void SwapBuffersOnThread(LayerTreeHostImpl* host_impl, bool result) override {
-    EXPECT_TRUE(result);
+  void SwapBuffersCompleteOnThread() override {
     std::vector<uint32_t>& satisfied =
         output_surface()->last_sent_frame()->metadata.satisfies_sequences;
     EXPECT_LE(satisfied.size(), 1u);
     if (satisfied.size() == 1) {
       // Eventually the one SurfaceSequence should be satisfied, but only
       // after the layer was removed from the tree, and only once.
       EXPECT_EQ(1u, satisfied[0]);
       EXPECT_LE(1, commit_count_);
       EXPECT_FALSE(sequence_was_satisfied_);
       sequence_was_satisfied_ = true;
@@ skipping 47 matching lines @@
     EXPECT_EQ(1u, required_set_.size());
     // Sequence should have been satisfied with the callback.
     EXPECT_TRUE(satisfied_sequence_ == SurfaceSequence(1u, 1u));
   }
 };
 
 MULTI_THREAD_TEST_F(SurfaceLayerSwapPromiseWithoutDraw);
 
 }  // namespace
 }  // namespace cc