Remove DCHECK_IMPLIES and CHECK_IMPLIES

cc/layers/picture_layer_impl_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 "cc/layers/picture_layer_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <set>
 #include <utility>
@@ skipping 189 matching lines @@
   void SetupPendingTreeInternal(scoped_refptr<RasterSource> raster_source,
                                 const gfx::Size& tile_size,
                                 const Region& invalidation) {
     host_impl_.CreatePendingTree();
     host_impl_.pending_tree()->PushPageScaleFromMainThread(1.f, 0.25f, 100.f);
     LayerTreeImpl* pending_tree = host_impl_.pending_tree();
 
     // Steal from the recycled tree if possible.
     scoped_ptr<LayerImpl> pending_root = pending_tree->DetachLayerTree();
     scoped_ptr<FakePictureLayerImpl> pending_layer;
-    DCHECK_IMPLIES(pending_root, pending_root->id() == root_id_);
+    DCHECK(!pending_root || pending_root->id() == root_id_);
     if (!pending_root) {
       pending_root = LayerImpl::Create(pending_tree, root_id_);
       pending_layer = FakePictureLayerImpl::Create(pending_tree, id_);
       if (!tile_size.IsEmpty())
         pending_layer->set_fixed_tile_size(tile_size);
       pending_layer->SetDrawsContent(true);
     } else {
       pending_layer.reset(static_cast<FakePictureLayerImpl*>(
           pending_root->RemoveChild(pending_root->children()[0]).release()));
       if (!tile_size.IsEmpty())
@@ skipping 4730 matching lines @@
   result = layer->CalculateTileSize(gfx::Size(447, 400));
   EXPECT_EQ(result.width(), 448);
   EXPECT_EQ(result.height(), 448);
   result = layer->CalculateTileSize(gfx::Size(500, 499));
   EXPECT_EQ(result.width(), 512);
   EXPECT_EQ(result.height(), 500 + 2);
 }
 
 }  // namespace
 }  // namespace cc