Bring back the legacy TensorBuffer::CreateFromHostMemory implementation.

LiteRT-PiperOrigin-RevId: 826159522

Author: niuchl

litert/cc/litert_tensor_buffer.cc

@@ -62,6 +62,18 @@ Expected<TensorBuffer> TensorBuffer::CreateManaged(
   return TensorBuffer(tensor_buffer, OwnHandle::kYes);
 }
 
+Expected<TensorBuffer> TensorBuffer::CreateFromHostMemory(
+    const RankedTensorType& tensor_type, void* host_mem_addr,
+    size_t buffer_size) {
+  LiteRtTensorBuffer tensor_buffer;
+  auto litert_tensor_type = static_cast<LiteRtRankedTensorType>(tensor_type);
+
+  LITERT_RETURN_IF_ERROR(LiteRtCreateTensorBufferFromHostMemory(
+      &litert_tensor_type, host_mem_addr, buffer_size,
+      /*deallocator=*/nullptr, &tensor_buffer));
+  return TensorBuffer(tensor_buffer, OwnHandle::kYes);
+}
+
 Expected<TensorBuffer> TensorBuffer::CreateFromHostMemory(
     const Environment&, const RankedTensorType& tensor_type,
     void* host_mem_addr, size_t buffer_size) {

litert/cc/litert_tensor_buffer.h

@@ -105,10 +105,7 @@ class TensorBuffer
   [[deprecated]]
   static Expected<TensorBuffer> CreateFromHostMemory(
       const RankedTensorType& tensor_type, void* host_mem_addr,
-      size_t buffer_size) {
-    LITERT_ASSIGN_OR_RETURN(auto env, Environment::Create({}));
-    return CreateFromHostMemory(env, tensor_type, host_mem_addr, buffer_size);
-  }
+      size_t buffer_size);
 
   // Creates a TensorBuffer object that wraps an Android Hardware Buffer. Note
   // that the provided AHardwareBuffer is not owned by the TensorBuffer object