[ROCm] Interface changes for StreamExecutor to support both CUDA and ROCm

1) StreamInterface::CudaStreamMemberHack()

Despite the fact that StreamExecutor and GPU common runtime are largely
orthogonal, this particular routine in StreamExecutor is used in GPU common
runtime and a couple of other operators. In this commit it's renamed as
StreamInterface::GpuStreamMemberHack() and their call sites are also changed.

2) StreamExecutorInterface::CudaContextHack()

This member is renamed to StramExecutorInterface::GpuContextHack().

Changes introduced in this commit includes:

- some StreamExecutor interfaces and CUDA implementation
- GPU common runtime related to interface changes in StreamExecutor
- operators affected by interface changes in StreamExecutor

2 files changed, 3 insertions, 3 deletions

diff --git a/tensorflow/stream_executor/host/host_gpu_executor.h b/tensorflow/stream_executor/host/host_gpu_executor.h
index e82f57569f..858396ef96 100644
--- a/tensorflow/stream_executor/host/host_gpu_executor.h
+++ b/tensorflow/stream_executor/host/host_gpu_executor.h
@@ -202,7 +202,7 @@ class HostExecutor : public internal::StreamExecutorInterface {
     return std::unique_ptr<internal::TimerInterface>(new HostTimer());
   }
 
-  void *CudaContextHack() override { return nullptr; }
+  void *GpuContextHack() override { return nullptr; }
 
  private:
   const PluginConfig plugin_config_;
diff --git a/tensorflow/stream_executor/host/host_stream.h b/tensorflow/stream_executor/host/host_stream.h
index 5d7b8a3782..be88f074cf 100644
--- a/tensorflow/stream_executor/host/host_stream.h
+++ b/tensorflow/stream_executor/host/host_stream.h
@@ -34,8 +34,8 @@ class HostStream : public internal::StreamInterface {
 
   bool EnqueueTask(std::function<void()> task);
 
-  void *CudaStreamHack() override { return nullptr; }
-  void **CudaStreamMemberHack() override { return nullptr; }
+  void *GpuStreamHack() override { return nullptr; }
+  void **GpuStreamMemberHack() override { return nullptr; }
 
   void BlockUntilDone();