Convert //cc from scoped_ptr to std::unique_ptr.

cc/surfaces/surface_manager.cc

Index: cc/surfaces/surface_manager.cc
diff --git a/cc/surfaces/surface_manager.cc b/cc/surfaces/surface_manager.cc
index d22d1e56c73f7892c8af708692caf0fb08c74522..babd173446a5fca2ef2f9285441c55bd3d7657c9 100644
--- a/cc/surfaces/surface_manager.cc
+++ b/cc/surfaces/surface_manager.cc
@@ -57,7 +57,7 @@ void SurfaceManager::DeregisterSurface(SurfaceId surface_id) {
   surface_map_.erase(it);
 }
 
-void SurfaceManager::Destroy(scoped_ptr<Surface> surface) {
+void SurfaceManager::Destroy(std::unique_ptr<Surface> surface) {
   DCHECK(thread_checker_.CalledOnValidThread());
   surface->set_destroyed(true);
   surfaces_to_destroy_.push_back(surface.release());
@@ -127,7 +127,7 @@ void SurfaceManager::GarbageCollectSurfaces() {
   for (SurfaceDestroyList::iterator dest_it = surfaces_to_destroy_.begin();
        dest_it != surfaces_to_destroy_.end();) {
     if (!live_surfaces_set.count((*dest_it)->surface_id())) {
-      scoped_ptr<Surface> surf(*dest_it);
+      std::unique_ptr<Surface> surf(*dest_it);
       DeregisterSurface(surf->surface_id());
       dest_it = surfaces_to_destroy_.erase(dest_it);
     } else {