Fix implicit access to raw pointer of scoped_refptr.

cc/trees/layer_tree_host_unittest_serialization.cc

 // Copyright 2015 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 "cc/layers/heads_up_display_layer.h"
 #include "cc/layers/layer.h"
 #include "cc/proto/layer.pb.h"
 #include "cc/proto/layer_tree_host.pb.h"
@@ skipping 113 matching lines @@
         if (proto.root_layer().children(i).id() ==
             layer_tree_host_src_->hud_layer_->id()) {
           EXPECT_EQ(proto::LayerNode::HEADS_UP_DISPLAY_LAYER,
                     proto.root_layer().children(i).type());
           found_hud_layer_type = true;
           break;
         }
       }
       EXPECT_TRUE(found_hud_layer_type);
     } else {
-      EXPECT_EQ(nullptr, layer_tree_host_dst_->hud_layer_);
+      EXPECT_FALSE(layer_tree_host_dst_->hud_layer_);
     }
     if (layer_tree_host_src_->overscroll_elasticity_layer_) {
       EXPECT_EQ(layer_tree_host_src_->overscroll_elasticity_layer_->id(),
                 layer_tree_host_dst_->overscroll_elasticity_layer_->id());
     } else {
-      EXPECT_EQ(nullptr, layer_tree_host_dst_->overscroll_elasticity_layer_);
+      EXPECT_FALSE(layer_tree_host_dst_->overscroll_elasticity_layer_);
     }
     if (layer_tree_host_src_->page_scale_layer_) {
       EXPECT_EQ(layer_tree_host_src_->page_scale_layer_->id(),
                 layer_tree_host_dst_->page_scale_layer_->id());
     } else {
-      EXPECT_EQ(nullptr, layer_tree_host_dst_->page_scale_layer_);
+      EXPECT_FALSE(layer_tree_host_dst_->page_scale_layer_);
     }
     if (layer_tree_host_src_->inner_viewport_scroll_layer_) {
       EXPECT_EQ(layer_tree_host_src_->inner_viewport_scroll_layer_->id(),
                 layer_tree_host_dst_->inner_viewport_scroll_layer_->id());
     } else {
-      EXPECT_EQ(nullptr, layer_tree_host_dst_->inner_viewport_scroll_layer_);
+      EXPECT_FALSE(layer_tree_host_dst_->inner_viewport_scroll_layer_);
     }
     if (layer_tree_host_src_->outer_viewport_scroll_layer_) {
       EXPECT_EQ(layer_tree_host_src_->outer_viewport_scroll_layer_->id(),
                 layer_tree_host_dst_->outer_viewport_scroll_layer_->id());
     } else {
-      EXPECT_EQ(nullptr, layer_tree_host_dst_->outer_viewport_scroll_layer_);
+      EXPECT_FALSE(layer_tree_host_dst_->outer_viewport_scroll_layer_);
     }
     EXPECT_EQ(layer_tree_host_src_->selection_,
               layer_tree_host_dst_->selection_);
     EXPECT_EQ(layer_tree_host_src_->property_trees_,
               layer_tree_host_dst_->property_trees_);
     EXPECT_EQ(layer_tree_host_src_->surface_id_namespace_,
               layer_tree_host_dst_->surface_id_namespace_);
     EXPECT_EQ(layer_tree_host_src_->next_surface_sequence_,
               layer_tree_host_dst_->next_surface_sequence_);
 
@@ skipping 194 matching lines @@
 
 TEST_F(LayerTreeHostSerializationTest, LayersChangedMultipleSerializations) {
   RunLayersChangedMultipleSerializations();
 }
 
 TEST_F(LayerTreeHostSerializationTest, AddAndRemoveNodeFromLayerTree) {
   RunAddAndRemoveNodeFromLayerTree();
 }
 
 }  // namespace cc