cc: Remove ScopedPtrVector and cc::remove_if.

cc/trees/layer_tree_host_unittest_context.cc

Index: cc/trees/layer_tree_host_unittest_context.cc
diff --git a/cc/trees/layer_tree_host_unittest_context.cc b/cc/trees/layer_tree_host_unittest_context.cc
index 74b225e8725a261801f66400993612d5927bd2f0..3bb21701a7667a313fcdbaf90591385d824918c5 100644
--- a/cc/trees/layer_tree_host_unittest_context.cc
+++ b/cc/trees/layer_tree_host_unittest_context.cc
@@ -648,7 +648,7 @@ class LayerTreeHostContextTestLostContextSucceedsWithContent
 
   void DrawLayersOnThread(LayerTreeHostImpl* host_impl) override {
     FakePictureLayerImpl* picture_impl = static_cast<FakePictureLayerImpl*>(
-        host_impl->active_tree()->root_layer()->children()[0]);
+        host_impl->active_tree()->root_layer()->children()[0].get());
     EXPECT_TRUE(picture_impl->HighResTiling()
                     ->TileAt(0, 0)
                     ->draw_info()
@@ -857,9 +857,9 @@ class LayerTreeHostContextTestLayersNotified : public LayerTreeHostContextTest {
     root_picture = static_cast<FakePictureLayerImpl*>(
         host_impl->active_tree()->root_layer());
     child_picture =
-        static_cast<FakePictureLayerImpl*>(root_picture->children()[0]);
+        static_cast<FakePictureLayerImpl*>(root_picture->children()[0].get());
     grandchild_picture =
-        static_cast<FakePictureLayerImpl*>(child_picture->children()[0]);
+        static_cast<FakePictureLayerImpl*>(child_picture->children()[0].get());
 
     ++num_commits_;
     switch (num_commits_) {