Use thrust functions instead of custom functions (#5544)

src/data/device_adapter.cuh

@@ -44,7 +44,7 @@ class CudfAdapterBatch : public detail::NoMetaInfo {
   size_t Size() const { return num_elements_; }
   __device__ COOTuple GetElement(size_t idx) const {
     size_t column_idx =
-        dh::UpperBound(column_ptr_.data(), column_ptr_.size(), idx) - 1;
+        thrust::upper_bound(thrust::seq,column_ptr_.begin(), column_ptr_.end(), idx) - column_ptr_.begin() - 1;
     auto& column = columns_[column_idx];
     size_t row_idx = idx - column_ptr_[column_idx];
     float value = column.valid.Data() == nullptr || column.valid.Check(row_idx)

src/data/ellpack_page.cu

@@ -49,7 +49,9 @@ __global__ void CompressBinEllpackKernel(
     int ncuts = cut_rows[feature + 1] - cut_rows[feature];
     // Assigning the bin in current entry.
     // S.t.: fvalue < feature_cuts[bin]
-    bin = dh::UpperBound(feature_cuts, ncuts, fvalue);
+    bin = thrust::upper_bound(thrust::seq, feature_cuts, feature_cuts + ncuts,
+                              fvalue) -
+          feature_cuts;
     if (bin >= ncuts) {
       bin = ncuts - 1;
     }