Manual refactor to enum-based WaitableEvent for remaining mac/ios files

components/cronet/ios/test/cronet_bidirectional_stream_test.mm

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import <Foundation/Foundation.h>
 #include <stdint.h>
 #include <list>
 #include <map>
 #include <string>
 
@@ skipping 109 matching lines @@
   // Test results.
   ResponseStep response_step;
   char* read_buffer;
   std::map<std::string, std::string> response_headers;
   std::map<std::string, std::string> response_trailers;
   std::vector<std::string> read_data;
   int net_error;
 
   TestBidirectionalStreamCallback()
       : stream(nullptr),
-        stream_done_event(true, false),
+        stream_done_event(base::WaitableEvent::ResetPolicy::MANUAL,
+                          base::WaitableEvent::InitialState::NOT_SIGNALED),
         expected_negotiated_protocol("quic/1+spdy/3"),
         cancel_from_step(NOTHING),
         read_buffer_size(32768),
         response_step(NOTHING),
         read_buffer(nullptr),
         net_error(0) {}
 
   ~TestBidirectionalStreamCallback() {
     if (read_buffer)
       delete read_buffer;
@@ skipping 296 matching lines @@
   cronet_bidirectional_stream_start(test.stream, "https://notfound.example.com",
                                     0, "GET", &kTestHeadersArray, true);
   test.BlockForDone();
   ASSERT_TRUE(test.read_data.empty());
   ASSERT_EQ(TestBidirectionalStreamCallback::ON_FAILED, test.response_step);
   ASSERT_EQ(net::ERR_NAME_NOT_RESOLVED, test.net_error);
   cronet_bidirectional_stream_destroy(test.stream);
 }
 
 }  // namespace cronet