[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, 11 insertions, 0 deletions

diff --git a/tensorflow/stream_executor/stream_executor.h b/tensorflow/stream_executor/stream_executor.h
index 2995dccf46..d63d485df5 100644
--- a/tensorflow/stream_executor/stream_executor.h
+++ b/tensorflow/stream_executor/stream_executor.h
@@ -35,4 +35,15 @@ limitations under the License.
 #include "tensorflow/stream_executor/stream_executor_pimpl.h"  // IWYU pragma: export
 #include "tensorflow/stream_executor/timer.h"  // IWYU pragma: export
 
+namespace perftools {
+namespace gputools {
+
+// Temporarily pull stream_executor into perftools::gputools while we migrate
+// code to the new namespace.  TODO(b/77980417): Remove this once we've
+// completed the migration.
+using namespace stream_executor;  // NOLINT[build/namespaces]
+
+}  // namespace gputools
+}  // namespace perftools
+
 #endif  // TENSORFLOW_STREAM_EXECUTOR_STREAM_EXECUTOR_H_