Remove DCHECK_IMPLIES and CHECK_IMPLIES

cc/layers/picture_layer_impl_unittest.cc

Index: cc/layers/picture_layer_impl_unittest.cc
diff --git a/cc/layers/picture_layer_impl_unittest.cc b/cc/layers/picture_layer_impl_unittest.cc
index bbfcffb83cf7ec82b63a61787169b16857ed0890..53707483e646ade268e9246d02216ca3b5f916ea 100644
--- a/cc/layers/picture_layer_impl_unittest.cc
+++ b/cc/layers/picture_layer_impl_unittest.cc
@@ -207,7 +207,7 @@ class PictureLayerImplTest : public testing::Test {
     // 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_);