Add RaggedTensorToTensor to flex delegate

The ragged_to_dense_util should be put in core/util instead of core/ops.
Then it can be added to mobile_srcs_only_runtime.

PiperOrigin-RevId: 320885158
Change-Id: I1083c2ac57e87b4e29a6e5fef2998d7b7a951133

tensorflow/core/BUILD

@@ -798,36 +798,7 @@ tf_gen_op_libs(
         "ragged_conversion_ops",
         "ragged_math_ops",
     ],
-    deps = [":ragged_to_dense_util"],
-)
-
-cc_library(
-    name = "ragged_to_dense_util",
-    srcs = [
-        "ops/ragged_to_dense_util.cc",
-    ],
-    hdrs = [
-        "ops/ragged_to_dense_util.h",
-    ],
-    deps = [
-        ":framework",
-        ":protos_all_cc",
-    ],
-)
-
-tf_cc_test(
-    name = "ragged_to_dense_util_test",
-    srcs = [
-        "ops/ragged_to_dense_util_test.cc",
-    ],
-    deps = [
-        ":framework",
-        ":protos_all_cc",
-        ":ragged_to_dense_util",
-        ":test",
-        ":testlib",
-        "@com_google_googletest//:gtest_main",
-    ],
+    deps = ["//tensorflow/core/util:ragged_to_dense_util"],
 )
 
 cc_library(

tensorflow/core/kernels/BUILD

@@ -1508,7 +1508,7 @@ tf_kernel_library(
         "//tensorflow/core:framework_lite",
         "//tensorflow/core:lib",
         "//tensorflow/core:protos_all_cc",
-        "//tensorflow/core:ragged_to_dense_util",
+        "//tensorflow/core/util:ragged_to_dense_util",
     ],
 )
 
@@ -6909,6 +6909,7 @@ filegroup(
         "queue_op.cc",
         "queue_ops.cc",
         "ragged_range_op.cc",
+        "ragged_tensor_to_tensor_op.cc",
         "random_op.cc",
         "random_op_cpu.h",
         "random_poisson_op.cc",

tensorflow/core/kernels/ragged_tensor_to_tensor_op.cc

@@ -37,9 +37,9 @@ limitations under the License.
 #include "tensorflow/core/lib/bfloat16/bfloat16.h"
 #include "tensorflow/core/lib/core/errors.h"
 #include "tensorflow/core/lib/core/status.h"
-#include "tensorflow/core/ops/ragged_to_dense_util.h"
 #include "tensorflow/core/platform/types.h"
 #include "tensorflow/core/util/bcast.h"
+#include "tensorflow/core/util/ragged_to_dense_util.h"
 
 namespace tensorflow {
 

tensorflow/core/ops/ragged_conversion_ops.cc

@@ -15,7 +15,7 @@ limitations under the License.
 #include "tensorflow/core/framework/common_shape_fns.h"
 #include "tensorflow/core/framework/op.h"
 #include "tensorflow/core/framework/shape_inference.h"
-#include "tensorflow/core/ops/ragged_to_dense_util.h"
+#include "tensorflow/core/util/ragged_to_dense_util.h"
 
 namespace tensorflow {
 

tensorflow/core/util/BUILD

@@ -93,6 +93,8 @@ filegroup(
         "port.h",
         "presized_cuckoo_map.h",
         "ptr_util.h",
+        "ragged_to_dense_util.cc",
+        "ragged_to_dense_util.h",
         "reffed_status_callback.h",
         "saved_tensor_slice_util.cc",
         "saved_tensor_slice_util.h",
@@ -368,6 +370,35 @@ cc_library(
     ],
 )
 
+cc_library(
+    name = "ragged_to_dense_util",
+    srcs = [
+        "ragged_to_dense_util.cc",
+    ],
+    hdrs = [
+        "ragged_to_dense_util.h",
+    ],
+    deps = [
+        "//tensorflow/core:framework",
+        "//tensorflow/core:protos_all_cc",
+    ],
+)
+
+tf_cc_test(
+    name = "ragged_to_dense_util_test",
+    srcs = [
+        "ragged_to_dense_util_test.cc",
+    ],
+    deps = [
+        ":ragged_to_dense_util",
+        "//tensorflow/core:framework",
+        "//tensorflow/core:protos_all_cc",
+        "//tensorflow/core:test",
+        "//tensorflow/core:testlib",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
 tf_cc_test(
     name = "stats_calculator_test",
     srcs = ["stats_calculator_test.cc"],

tensorflow/core/util/ragged_to_dense_util.cc

@@ -13,7 +13,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 ==============================================================================*/
 
-#include "tensorflow/core/ops/ragged_to_dense_util.h"
+#include "tensorflow/core/util/ragged_to_dense_util.h"
 
 #include "tensorflow/core/framework/op.h"
 #include "tensorflow/core/framework/shape_inference.h"

tensorflow/core/util/ragged_to_dense_util_test.cc

@@ -13,10 +13,9 @@ See the License for the specific language governing permissions and
 limitations under the License.
 ==============================================================================*/
 
-#include "tensorflow/core/ops/ragged_to_dense_util.h"
+#include "tensorflow/core/util/ragged_to_dense_util.h"
 
 #include <gmock/gmock.h>
-#include <gtest/gtest.h>
 #include "tensorflow/core/framework/op.h"
 #include "tensorflow/core/framework/shape_inference.h"
 #include "tensorflow/core/framework/tensor_shape.h"

tensorflow/lite/delegates/flex/allowlisted_flex_ops.cc

@@ -299,6 +299,7 @@ bool IsAllowlistedFlexOp(const std::string& tensorflow_op_name) {
           "RFFT2D",
           "RFFT3D",
           "RaggedRange",
+          "RaggedTensorToTensor",
           "RandomGamma",
           "RandomStandardNormal",
           "RandomUniform",