[presubmit] Fix whitespace/semicolon linter violations.

src/base/platform/condition-variable.cc

Index: src/base/platform/condition-variable.cc
diff --git a/src/base/platform/condition-variable.cc b/src/base/platform/condition-variable.cc
index 982497fea449959c54d2ceea5ed0ee70809a7785..e5b9bd0810edb65e09a1e0911fab391cf7757e99 100644
--- a/src/base/platform/condition-variable.cc
+++ b/src/base/platform/condition-variable.cc
@@ -264,8 +264,8 @@ void ConditionVariable::Wait(Mutex* mutex) {
   mutex->Unlock();
 
   // Wait on the wait event.
-  while (!event->WaitFor(INFINITE))
-    ;
+  while (!event->WaitFor(INFINITE)) {
+  }
 
   // Reaquire the user mutex.
   mutex->Lock();