Migrate from CRITICAL_SECTION to SRWLOCK

base/synchronization/lock.h

Index: base/synchronization/lock.h
diff --git a/base/synchronization/lock.h b/base/synchronization/lock.h
index 39a26b77d6f8286c3b6c54cfd75b0cf6940c8f56..fbf6cef76911c80332da1524beeb23fd14737917 100644
--- a/base/synchronization/lock.h
+++ b/base/synchronization/lock.h
@@ -38,9 +38,9 @@ class BASE_EXPORT Lock {
   Lock();
   ~Lock();
 
-  // NOTE: Although windows critical sections support recursive locks, we do not
-  // allow this, and we will commonly fire a DCHECK() if a thread attempts to
-  // acquire the lock a second time (while already holding it).
+  // NOTE: We do not permit recursive locks and will commonly fire a DCHECK() if
+  // a thread attempts to acquire the lock a second time (while already holding
+  // it).
   void Acquire() {
     lock_.Lock();
     CheckUnheldAndMark();