Preserve EWLayer timing measurements with SYCL backend

Author: allnes

test/single_layer/test_ewlayer.cpp

@@ -310,10 +310,16 @@ TEST(ewlayer, parallel_for_direct) {
   }
 
   for (auto backend : test_support::all_parallel_backends()) {
+    auto start = std::chrono::high_resolution_clock::now();
     parallel::parallel_for(SIZE * SIZE, [&](std::size_t i) {
       result[i] = matrix1[i] + matrix2[i];
     }, backend);
 
+    auto end = std::chrono::high_resolution_clock::now();
+    auto total_duration =
+        std::chrono::duration_cast<std::chrono::milliseconds>(end - start);
+    (void)total_duration;
+
     for (int i = 0; i < SIZE * SIZE; i++) {
       ASSERT_EQ(result[i], 2);
     }
@@ -330,10 +336,16 @@ TEST(ewlayer, parallel_for_notmatrix) {
   }
 
   for (auto backend : test_support::all_parallel_backends()) {
+    auto start = std::chrono::high_resolution_clock::now();
     parallel::parallel_for(SIZE * SIZE, [&](std::size_t i) {
       result[i] = matrix1[i] + 1;
     }, backend);
 
+    auto end = std::chrono::high_resolution_clock::now();
+    auto total_duration =
+        std::chrono::duration_cast<std::chrono::milliseconds>(end - start);
+    (void)total_duration;
+
     for (int i = 0; i < SIZE * SIZE; i++) {
       ASSERT_EQ(result[i], 2);
     }