Make ifdefs consistent in WebKit/Source/core/

third_party/WebKit/Source/platform/Timer.cpp

Index: third_party/WebKit/Source/platform/Timer.cpp
diff --git a/third_party/WebKit/Source/platform/Timer.cpp b/third_party/WebKit/Source/platform/Timer.cpp
index 18202fe630183598c3b5d0f50fda86782a8d6ca0..5d75c69b6941e1e911bfc9832623b9e073723c3f 100644
--- a/third_party/WebKit/Source/platform/Timer.cpp
+++ b/third_party/WebKit/Source/platform/Timer.cpp
@@ -58,7 +58,7 @@ TimerBase::~TimerBase() {
 void TimerBase::start(double nextFireInterval,
                       double repeatInterval,
                       const WebTraceLocation& caller) {
-  ASSERT(m_thread == currentThread());
+  DCHECK(m_thread == currentThread());
 
   m_location = caller;
   m_repeatInterval = repeatInterval;
@@ -66,7 +66,7 @@ void TimerBase::start(double nextFireInterval,
 }
 
 void TimerBase::stop() {
-  ASSERT(m_thread == currentThread());
+  DCHECK(m_thread == currentThread());
 
   m_repeatInterval = 0;
   m_nextFireTime = 0;
@@ -96,7 +96,7 @@ WebTaskRunner* TimerBase::timerTaskRunner() const {
 }
 
 void TimerBase::setNextFireTime(double now, double delay) {
-  ASSERT(m_thread == currentThread());
+  DCHECK(m_thread == currentThread());
 
   double newTime = now + delay;