Allow std::unordered_*.

cc/layers/delegated_renderer_layer_impl.cc

Index: cc/layers/delegated_renderer_layer_impl.cc
diff --git a/cc/layers/delegated_renderer_layer_impl.cc b/cc/layers/delegated_renderer_layer_impl.cc
index 000a7ea809a449e6f1b38ea462336368c467d6af..b56374a8152ec85ee6c3fd7a41ee699df31c7219 100644
--- a/cc/layers/delegated_renderer_layer_impl.cc
+++ b/cc/layers/delegated_renderer_layer_impl.cc
@@ -106,16 +106,7 @@ void DelegatedRendererLayerImpl::SetFrameData(
   bool invalid_frame = false;
   ResourceProvider::ResourceIdSet resources_in_frame;
   size_t reserve_size = frame_data->resource_list.size();
-#if defined(COMPILER_MSVC)
   resources_in_frame.reserve(reserve_size);
-#elif defined(COMPILER_GCC)
-  // Pre-standard hash-tables only implement resize, which behaves similarly
-  // to reserve for these keys. Resizing to 0 may also be broken (particularly
-  // on stlport).
-  // TODO(jbauman): Replace with reserve when C++11 is supported everywhere.
-  if (reserve_size)
-    resources_in_frame.resize(reserve_size);
-#endif
   for (const auto& pass : render_pass_list) {
     for (const auto& quad : pass->quad_list) {
       for (ResourceId& resource_id : quad->resources) {