cc: Remove ScopedPtrVector and cc::remove_if.

cc/trees/layer_tree_host_unittest_occlusion.cc

Index: cc/trees/layer_tree_host_unittest_occlusion.cc
diff --git a/cc/trees/layer_tree_host_unittest_occlusion.cc b/cc/trees/layer_tree_host_unittest_occlusion.cc
index 37c56d1e74a2a33bf1ae940af27a49e9b9e1d156..13496f5111deb31b70e8545030b60050498f67e6 100644
--- a/cc/trees/layer_tree_host_unittest_occlusion.cc
+++ b/cc/trees/layer_tree_host_unittest_occlusion.cc
@@ -49,7 +49,7 @@ class LayerTreeHostOcclusionTestDrawPropertiesOnLayer
 
   void DrawLayersOnThread(LayerTreeHostImpl* impl) override {
     LayerImpl* root = impl->active_tree()->root_layer();
-    LayerImpl* child = root->children()[0];
+    LayerImpl* child = root->children()[0].get();
 
     // Verify the draw properties are valid.
     EXPECT_TRUE(root->IsDrawnRenderSurfaceLayerListMember());
@@ -102,7 +102,7 @@ class LayerTreeHostOcclusionTestDrawPropertiesOnSurface
 
   void DrawLayersOnThread(LayerTreeHostImpl* impl) override {
     LayerImpl* root = impl->active_tree()->root_layer();
-    LayerImpl* child = root->children()[0];
+    LayerImpl* child = root->children()[0].get();
     RenderSurfaceImpl* surface = child->render_surface();
 
     // Verify the draw properties are valid.
@@ -165,7 +165,7 @@ class LayerTreeHostOcclusionTestDrawPropertiesOnMask
 
   void DrawLayersOnThread(LayerTreeHostImpl* impl) override {
     LayerImpl* root = impl->active_tree()->root_layer();
-    LayerImpl* child = root->children()[0];
+    LayerImpl* child = root->children()[0].get();
     RenderSurfaceImpl* surface = child->render_surface();
     LayerImpl* mask = child->mask_layer();
 
@@ -237,7 +237,7 @@ class LayerTreeHostOcclusionTestDrawPropertiesInsideReplica
 
   void DrawLayersOnThread(LayerTreeHostImpl* impl) override {
     LayerImpl* root = impl->active_tree()->root_layer();
-    LayerImpl* child = root->children()[0];
+    LayerImpl* child = root->children()[0].get();
     RenderSurfaceImpl* surface = child->render_surface();
     LayerImpl* mask = child->mask_layer();