Remove DCHECK_IMPLIES and CHECK_IMPLIES

cc/tiles/tile_manager_unittest.cc

 // Copyright 2013 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 "base/run_loop.h"
 #include "base/thread_task_runner_handle.h"
 #include "cc/resources/resource_pool.h"
 #include "cc/test/begin_frame_args_test.h"
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
@@ skipping 95 matching lines @@
     ActivateTree();
     SetupPendingTree(pending_pile);
   }
 
   void SetupPendingTree(scoped_refptr<PicturePileImpl> pile) {
     host_impl_.CreatePendingTree();
     LayerTreeImpl* pending_tree = host_impl_.pending_tree();
 
     // Steal from the recycled tree.
     scoped_ptr<LayerImpl> old_pending_root = pending_tree->DetachLayerTree();
-    DCHECK_IMPLIES(old_pending_root, old_pending_root->id() == id_);
+    DCHECK(!old_pending_root || old_pending_root->id() == id_);
 
     scoped_ptr<FakePictureLayerImpl> pending_layer;
     if (old_pending_root) {
       pending_layer.reset(
           static_cast<FakePictureLayerImpl*>(old_pending_root.release()));
       pending_layer->SetRasterSourceOnPending(pile, Region());
     } else {
       pending_layer =
           FakePictureLayerImpl::CreateWithRasterSource(pending_tree, id_, pile);
       pending_layer->SetDrawsContent(true);
@@ skipping 1385 matching lines @@
         .WillOnce(testing::Invoke([&run_loop]() { run_loop.Quit(); }));
     host_impl_.tile_manager()->PrepareTiles(host_impl_.global_tile_state());
     host_impl_.tile_manager()->SetMoreTilesNeedToBeRasterizedForTesting();
     EXPECT_TRUE(host_impl_.tile_manager()->HasScheduledTileTasksForTesting());
     run_loop.Run();
   }
 }
 
 }  // namespace
 }  // namespace cc