Make operators on scoped_ptr match the ones defined for std::unique_ptr

cc/trees/layer_tree_host_impl.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_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <set>
@@ skipping 881 matching lines @@
           FindRenderPassById(frame->render_passes, contributing_render_pass_id);
       AppendQuadsForRenderSurfaceLayer(target_render_pass,
                                        *it,
                                        contributing_render_pass,
                                        &append_quads_data);
     } else if (it.represents_itself() && !it->visible_layer_rect().IsEmpty()) {
       bool occluded =
           it->draw_properties().occlusion_in_content_space.IsOccluded(
               it->visible_layer_rect());
       if (!occluded && it->WillDraw(draw_mode, resource_provider_.get())) {
-        DCHECK_EQ(active_tree_, it->layer_tree_impl());
+        DCHECK_EQ(active_tree_.get(), it->layer_tree_impl());
 
         frame->will_draw_layers.push_back(*it);
 
         if (it->HasContributingDelegatedRenderPasses()) {
           RenderPassId contributing_render_pass_id =
               it->FirstContributingRenderPassId();
           while (true) {
             RenderPass* pass = FindRenderPassById(frame->render_passes,
                                                   contributing_render_pass_id);
             if (!pass)
@@ skipping 2781 matching lines @@
   return task_runner_provider_->HasImplThread();
 }
 
 bool LayerTreeHostImpl::CommitToActiveTree() const {
   // In single threaded mode we skip the pending tree and commit directly to the
   // active tree.
   return !task_runner_provider_->HasImplThread();
 }
 
 }  // namespace cc