[Sync] Move sessions/ to engine/cycle/ and rename things to match.

components/sync/engine_impl/cycle/nudge_tracker_unittest.cc

Index: components/sync/engine_impl/cycle/nudge_tracker_unittest.cc
diff --git a/components/sync/sessions_impl/nudge_tracker_unittest.cc b/components/sync/engine_impl/cycle/nudge_tracker_unittest.cc
similarity index 99%
rename from components/sync/sessions_impl/nudge_tracker_unittest.cc
rename to components/sync/engine_impl/cycle/nudge_tracker_unittest.cc
index 469f036e4f2a5ec27cf40dfc4d7b8b60e709fb6e..910171e845d95e5b633e472cabfa8c7a94b337dd 100644
--- a/components/sync/sessions_impl/nudge_tracker_unittest.cc
+++ b/components/sync/engine_impl/cycle/nudge_tracker_unittest.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "components/sync/sessions_impl/nudge_tracker.h"
+#include "components/sync/engine_impl/cycle/nudge_tracker.h"
 
 #include <stddef.h>
 #include <stdint.h>
@@ -35,8 +35,6 @@ testing::AssertionResult ModelTypeSetEquals(ModelTypeSet a, ModelTypeSet b) {
 
 }  // namespace
 
-namespace sessions {
-
 class NudgeTrackerTest : public ::testing::Test {
  public:
   NudgeTrackerTest() { SetInvalidationsInSync(); }
@@ -966,5 +964,4 @@ TEST_F(NudgeTrackerAckTrackingTest, UnknownVersionFromServer_Complex) {
   EXPECT_TRUE(AllInvalidationsAccountedFor());
 }
 
-}  // namespace sessions
 }  // namespace syncer