Fix typos.

Test: art/test/testrunner/testrunner.py
Change-Id: I5f5e052c940650a3adb3a8717b84260e6b306500
diff --git a/openjdkjvmti/deopt_manager.cc b/openjdkjvmti/deopt_manager.cc
index 9e11a25..9f5db7e 100644
--- a/openjdkjvmti/deopt_manager.cc
+++ b/openjdkjvmti/deopt_manager.cc
@@ -277,7 +277,7 @@
 }
 
 void DeoptManager::RemoveDeoptimizeAllMethodsLocked(art::Thread* self) {
-  DCHECK_GT(global_deopt_count_, 0u) << "Request to remove non-existant global deoptimization!";
+  DCHECK_GT(global_deopt_count_, 0u) << "Request to remove non-existent global deoptimization!";
   global_deopt_count_--;
   if (global_deopt_count_ == 0) {
     PerformGlobalUndeoptimization(self);