[StreamExecutor] Rename ::perftools::gputools -> ::stream_executor, part 1.

Step 1 of re-namespace'ing StreamExecutor into ::stream_executor.

This moves everything inside of stream_executor/..., and leaves a
namespace alias into ::perftools::gputools.  The next steps will clean
up users to use the new namespace.

This is mostly a mechanical change, but it also includes a bunch of
non-mechanical changes that ideally would be split out into separate
patches.  Unfortunately they all sort of need to be shoved in here for
various reasons:

 - forward declarations need to be in the same namespace as the actual
   types, so we need to change all forward declarations of
   StreamExecutor types in this one patch.

 - Uses of these forward declarations need to be changed to the new
   namespace (or otherwise we need to add a namespace alias to the
   relevant header, but this is pretty ugly).

 - Various initialization code needs to live in StreamExecutor's "real"
   namespace, so all this needs to be changed.

PiperOrigin-RevId: 193256128

1 files changed, 3 insertions, 5 deletions

diff --git a/tensorflow/stream_executor/fft.h b/tensorflow/stream_executor/fft.h
index 6b1728829a..814efb2e92 100644
--- a/tensorflow/stream_executor/fft.h
+++ b/tensorflow/stream_executor/fft.h
@@ -48,8 +48,7 @@ limitations under the License.
 #include <memory>
 #include "tensorflow/stream_executor/platform/port.h"
 
-namespace perftools {
-namespace gputools {
+namespace stream_executor {
 
 class Stream;
 template <typename ElemT>
@@ -210,7 +209,7 @@ class FftSupport {
 
 // Macro used to quickly declare overrides for abstract virtuals in the
 // fft::FftSupport base class. Assumes that it's emitted somewhere inside the
-// ::perftools::gputools namespace.
+// ::stream_executor namespace.
 #define TENSORFLOW_STREAM_EXECUTOR_GPU_FFT_SUPPORT_OVERRIDES                   \
   std::unique_ptr<fft::Plan> Create1dPlan(Stream *stream, uint64 num_x,        \
                                           fft::Type type, bool in_place_fft)   \
@@ -265,7 +264,6 @@ class FftSupport {
              DeviceMemory<double> *output) override;
 
 }  // namespace fft
-}  // namespace gputools
-}  // namespace perftools
+}  // namespace stream_executor
 
 #endif  // TENSORFLOW_STREAM_EXECUTOR_FFT_H_