Change some DCHECK( == 0), to DCHECK_EQ in the posix lock implementation.

base/lock_impl_posix.cc

Index: base/lock_impl_posix.cc
diff --git a/base/lock_impl_posix.cc b/base/lock_impl_posix.cc
index 59f7793feee122d7ed41caf021568e7409c7c446..355149f2602ee8b5bbdd15072c8f47960da2d2e6 100644
--- a/base/lock_impl_posix.cc
+++ b/base/lock_impl_posix.cc
@@ -13,13 +13,13 @@ LockImpl::LockImpl() {
   // In debug, setup attributes for lock error checking.
   pthread_mutexattr_t mta;
   int rv = pthread_mutexattr_init(&mta);
-  DCHECK(rv == 0);
+  DCHECK_EQ(rv, 0);
   rv = pthread_mutexattr_settype(&mta, PTHREAD_MUTEX_ERRORCHECK);
-  DCHECK(rv == 0);
+  DCHECK_EQ(rv, 0);
   rv = pthread_mutex_init(&os_lock_, &mta);
-  DCHECK(rv == 0);
+  DCHECK_EQ(rv, 0);
   rv = pthread_mutexattr_destroy(&mta);
-  DCHECK(rv == 0);
+  DCHECK_EQ(rv, 0);
 #else
   // In release, go with the default lock attributes.
   pthread_mutex_init(&os_lock_, NULL);
@@ -28,7 +28,7 @@ LockImpl::LockImpl() {
 
 LockImpl::~LockImpl() {
   int rv = pthread_mutex_destroy(&os_lock_);
-  DCHECK(rv == 0);
+  DCHECK_EQ(rv, 0);
 }
 
 bool LockImpl::Try() {
@@ -39,10 +39,10 @@ bool LockImpl::Try() {
 
 void LockImpl::Lock() {
   int rv = pthread_mutex_lock(&os_lock_);
-  DCHECK(rv == 0);
+  DCHECK_EQ(rv, 0);
 }
 
 void LockImpl::Unlock() {
   int rv = pthread_mutex_unlock(&os_lock_);
-  DCHECK(rv == 0);
+  DCHECK_EQ(rv, 0);
 }