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This reverts commit d91dacc0.

Reason for revert: Failed base_unittests Run on OS: 'Ubuntu-14.04'
SequenceBoundTest.MultiplyDerivedDestructionWorksLeftSuper
SequenceBoundTest.MoveAssignmentFromDerivedClass
SequenceBoundTest.MoveConstructionFromSameClass
SequenceBoundTest.MoveAssignmentFromSameClass
SequenceBoundTest.PostBeforeConstruction
SequenceBoundTest.MoveConstructionFromDerivedClass
SequenceBoundTest.MultiplyDerivedPostToLeftBaseClass
SequenceBoundTest.ConstructThenPostThenReset
SequenceBoundTest.MoveAssignmentFromDerivedClassDestroysOldObject
SequenceBoundTest.MultiplyDerivedDestructionWorksRightSuper
SequenceBoundTest.MultiplyDerivedPostToRightBaseClass

https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Linux%20CFI/10148

Original change's description:
> SequenceBound<T> for classes with affinity to a sequence.
> 
> SequenceBound<T> allows for easy creation, posting, and destruction
> objects of type T on a designated Sequence.  It does not expose the
> underlying pointer to T, so it's hard to accidentally pass them around
> in callbacks that are then run on the wrong thread.
> 
> A SequenceBound<> may be created anywhere, passed (moved) between
> threads, etc., safely.  Destruction of the SequenceBound schedules
> destruction of the underlying instance of T on the appropriate thread.
> 
> Not implemented here (but prototyped elsewhere) are weak pointers
> to these objects that may be passed and used between threads safely;
> utility functions to generate thread-hopping callbacks; support for
> strong shared ownership semantics.
> 
> Tests: sequence_bound_unittest.cc
> 
> Cq-Include-Trybots: luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
> Change-Id: I3bbf7e975884fce8e18f3bb15a0d211ead58a619
> Reviewed-on: https://chromium-review.googlesource.com/875241
> Commit-Queue: Frank Liberato <liberato@chromium.org>
> Reviewed-by: Daniel Cheng <dcheng@chromium.org>
> Reviewed-by: Taiju Tsuiki <tzik@chromium.org>
> Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#591429}

TBR=dcheng@chromium.org,dalecurtis@chromium.org,liberato@chromium.org,tzik@chromium.org

Change-Id: I122ffbe8eb1670e7a252392fb7c28652672d1bc7
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Cq-Include-Trybots: luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Reviewed-on: https://chromium-review.googlesource.com/1227356Reviewed-by: Jian Li <jianli@chromium.org>
Commit-Queue: Jian Li <jianli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#591477}