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

cc/trees/damage_tracker_unittest.cc

Index: cc/trees/damage_tracker_unittest.cc
diff --git a/cc/trees/damage_tracker_unittest.cc b/cc/trees/damage_tracker_unittest.cc
index 949baa2fe94275bfbacba1744487a652e7b970ff..7dbfa10cddc1bc1f5c133dc959252bba437f02b1 100644
--- a/cc/trees/damage_tracker_unittest.cc
+++ b/cc/trees/damage_tracker_unittest.cc
@@ -1384,7 +1384,7 @@ TEST_F(DamageTrackerTest, VerifyDamageForEmptyLayerList) {
   root->SetHasRenderSurface(true);
   root->draw_properties().render_target = root.get();
 
-  ASSERT_TRUE(root == root->render_target());
+  ASSERT_EQ(root.get(), root->render_target());
   RenderSurfaceImpl* target_surface = root->render_surface();
 
   LayerImplList empty_list;