Add skeleton circular queue file.

base/BUILD.gn

Index: base/BUILD.gn
diff --git a/base/BUILD.gn b/base/BUILD.gn
index 899c7d2138b415d27bfdd1bfa5a8a5e4d20d1ade..0ccb5d40cf26304a3b6364b65b90b91d94cb7a44 100644
--- a/base/BUILD.gn
+++ b/base/BUILD.gn
@@ -230,6 +230,7 @@ component("base") {
     "command_line.h",
     "compiler_specific.h",
     "containers/adapters.h",
+    "containers/circular_deque.h",
     "containers/flat_map.h",
     "containers/flat_set.h",
     "containers/flat_tree.h",
@@ -238,6 +239,7 @@ component("base") {
     "containers/mru_cache.h",
     "containers/small_map.h",
     "containers/stack_container.h",
+    "containers/vector_buffer.h",
     "cpu.cc",
     "cpu.h",
     "critical_closure.h",
@@ -1987,6 +1989,7 @@ test("base_unittests") {
     "cancelable_callback_unittest.cc",
     "command_line_unittest.cc",
     "containers/adapters_unittest.cc",
+    "containers/circular_deque_unittest.cc",
     "containers/flat_map_unittest.cc",
     "containers/flat_set_unittest.cc",
     "containers/flat_tree_unittest.cc",
@@ -1995,6 +1998,7 @@ test("base_unittests") {
     "containers/mru_cache_unittest.cc",
     "containers/small_map_unittest.cc",
     "containers/stack_container_unittest.cc",
+    "containers/vector_buffer_unittest.cc",
     "cpu_unittest.cc",
     "debug/activity_analyzer_unittest.cc",
     "debug/activity_tracker_unittest.cc",