Add a log when a tflite delegate is created.

PiperOrigin-RevId: 306590390
Change-Id: I98b5d17b95747420b2dd0c3c0c037a6088cd495e

tensorflow/lite/tools/evaluation/BUILD

@@ -71,6 +71,7 @@ cc_library(
     deps = [
         ":utils",
         "//tensorflow/lite/tools:command_line_flags",
+        "//tensorflow/lite/tools:logging",
         "//tensorflow/lite/tools:tool_params",
         "//tensorflow/lite/tools/benchmark:delegate_provider_hdr",
         "//tensorflow/lite/tools/benchmark:tflite_execution_providers",

tensorflow/lite/tools/evaluation/evaluation_delegate_provider.cc

@@ -16,6 +16,7 @@ limitations under the License.
 #include "tensorflow/lite/tools/evaluation/evaluation_delegate_provider.h"
 
 #include "tensorflow/lite/tools/command_line_flags.h"
+#include "tensorflow/lite/tools/logging.h"
 
 namespace tflite {
 namespace evaluation {
@@ -118,6 +119,7 @@ std::vector<TfLiteDelegatePtr> DelegateProviders::CreateAllDelegates(
     // user-specified benchmark params tells not to.
     if (ptr == nullptr) continue;
     delegates.emplace_back(std::move(ptr));
+    TFLITE_LOG(INFO) << one->GetName() << " delegate is created.";
   }
   return delegates;
 }