Migrate WaitableEvent to enum-based constructor in ppapi/

ppapi/proxy/video_encoder_resource_unittest.cc

Index: ppapi/proxy/video_encoder_resource_unittest.cc
diff --git a/ppapi/proxy/video_encoder_resource_unittest.cc b/ppapi/proxy/video_encoder_resource_unittest.cc
index 3d7fe118bce452a66d6ab0cbc9f3a15cb48a2cb3..a49379b912dcbc65b5c15d4a7f5e89647d5ee804 100644
--- a/ppapi/proxy/video_encoder_resource_unittest.cc
+++ b/ppapi/proxy/video_encoder_resource_unittest.cc
@@ -33,7 +33,10 @@ namespace {
 
 class MockCompletionCallback {
  public:
-  MockCompletionCallback() : called_(false), call_event_(false, false) {}
+  MockCompletionCallback()
+      : called_(false),
+        call_event_(base::WaitableEvent::ResetPolicy::AUTOMATIC,
+                    base::WaitableEvent::InitialState::NOT_SIGNALED) {}
 
   bool called() { return called_; }
   int32_t result() { return result_; }