Move OneWriterSeqLock and SharedMemorySeqLockBuffer from content/ to device/base/synchronization

base/synchronization/one_writer_seqlock_unittest.cc

Index: base/synchronization/one_writer_seqlock_unittest.cc
diff --git a/content/common/one_writer_seqlock_unittest.cc b/base/synchronization/one_writer_seqlock_unittest.cc
similarity index 90%
rename from content/common/one_writer_seqlock_unittest.cc
rename to base/synchronization/one_writer_seqlock_unittest.cc
index 84d5156a7bd6fad617e015519637858593740067..9664b304e4deafa6a5459688e8edfdef67c0a134 100644
--- a/content/common/one_writer_seqlock_unittest.cc
+++ b/base/synchronization/one_writer_seqlock_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 "content/common/one_writer_seqlock.h"
+#include "base/synchronization/one_writer_seqlock.h"
 
 #include <stdlib.h>
 
@@ -25,10 +25,9 @@ class BasicSeqLockTestThread : public PlatformThread::Delegate {
  public:
   BasicSeqLockTestThread() {}
 
-  void Init(
-      content::OneWriterSeqLock* seqlock,
-      TestData* data,
-      base::subtle::Atomic32* ready) {
+  void Init(base::OneWriterSeqLock* seqlock,
+            TestData* data,
+            base::subtle::Atomic32* ready) {
     seqlock_ = seqlock;
     data_ = data;
     ready_ = ready;
@@ -54,7 +53,7 @@ class BasicSeqLockTestThread : public PlatformThread::Delegate {
   }
 
  private:
-  content::OneWriterSeqLock* seqlock_;
+  base::OneWriterSeqLock* seqlock_;
   TestData* data_;
   base::AtomicRefCount* ready_;
 
@@ -67,8 +66,8 @@ class BasicSeqLockTestThread : public PlatformThread::Delegate {
 #define MAYBE_ManyThreads ManyThreads
 #endif
 TEST(OneWriterSeqLockTest, MAYBE_ManyThreads) {
-  content::OneWriterSeqLock seqlock;
-  TestData data = { 0, 0, 0 };
+  base::OneWriterSeqLock seqlock;
+  TestData data = {0, 0, 0};
   base::AtomicRefCount ready = 0;
 
   ANNOTATE_BENIGN_RACE_SIZED(&data, sizeof(data), "Racey reads are discarded");