Splitting DidSwap in cc::SwapPromise into WillSwap and DidSwap

cc/trees/layer_tree_host_unittest.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/trees/layer_tree_host.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 4542 matching lines @@
   }
 
   void DidActivate() override {
     base::AutoLock lock(result_->lock);
     EXPECT_FALSE(result_->did_activate_called);
     EXPECT_FALSE(result_->did_swap_called);
     EXPECT_FALSE(result_->did_not_swap_called);
     result_->did_activate_called = true;
   }
 
-  void DidSwap(CompositorFrameMetadata* metadata) override {
+  void WillSwap(CompositorFrameMetadata* metadata) override {
     base::AutoLock lock(result_->lock);
     EXPECT_FALSE(result_->did_swap_called);
     EXPECT_FALSE(result_->did_not_swap_called);
     result_->did_swap_called = true;
   }
 
+  void DidSwap() override {}
+
   DidNotSwapAction DidNotSwap(DidNotSwapReason reason) override {
     base::AutoLock lock(result_->lock);
     EXPECT_FALSE(result_->did_swap_called);
     EXPECT_FALSE(result_->did_not_swap_called);
     EXPECT_FALSE(result_->did_activate_called &&
                  reason != DidNotSwapReason::SWAP_FAILS);
     result_->did_not_swap_called = true;
     result_->reason = reason;
     return DidNotSwapAction::BREAK_PROMISE;
   }
@@ skipping 2414 matching lines @@
     EndTest();
   }
 
   void AfterTest() override {}
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostTestSubmitFrameResources);
 
 }  // namespace
 }  // namespace cc