Add default constructor for rtc::Event

Bug: webrtc:9962
Change-Id: Icaa91e657e6881fcb1553f354c07866109a0ea68
Reviewed-on: https://webrtc-review.googlesource.com/c/109500
Commit-Queue: Niels Moller <nisse@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25535}

modules/video_coding/codecs/test/video_codec_unittest.h

@@ -32,11 +32,7 @@ class VideoCodecUnitTest : public ::testing::Test {
   VideoCodecUnitTest()
       : encode_complete_callback_(this),
         decode_complete_callback_(this),
-        encoded_frame_event_(false /* manual reset */,
-                             false /* initially signaled */),
         wait_for_encoded_frames_threshold_(1),
-        decoded_frame_event_(false /* manual reset */,
-                             false /* initially signaled */),
         last_input_frame_timestamp_(0) {}
 
  protected:

modules/video_coding/codecs/test/videocodec_test_fixture_impl.cc

@@ -444,7 +444,7 @@ void VideoCodecTestFixtureImpl::ProcessAllFrames(
   }
 
   // Wait until we know that the last frame has been sent for encode.
-  rtc::Event sync_event(false, false);
+  rtc::Event sync_event;
   task_queue->PostTask([&sync_event] { sync_event.Set(); });
   sync_event.Wait(rtc::Event::kForever);
 

modules/video_coding/frame_buffer2.cc

@@ -46,7 +46,6 @@ FrameBuffer::FrameBuffer(Clock* clock,
                          VCMTiming* timing,
                          VCMReceiveStatisticsCallback* stats_callback)
     : clock_(clock),
-      new_continuous_frame_event_(false, false),
       jitter_estimator_(jitter_estimator),
       timing_(timing),
       inter_frame_delay_(clock_->TimeInMilliseconds()),

modules/video_coding/frame_buffer2_unittest.cc

@@ -137,9 +137,7 @@ class TestFrameBuffer2 : public ::testing::Test {
                                 &stats_callback_)),
         rand_(0x34678213),
         tear_down_(false),
-        extract_thread_(&ExtractLoop, this, "Extract Thread"),
-        trigger_extract_event_(false, false),
-        crit_acquired_event_(false, false) {}
+        extract_thread_(&ExtractLoop, this, "Extract Thread") {}
 
   void SetUp() override { extract_thread_.Start(); }
 

modules/video_coding/utility/quality_scaler_unittest.cc

@@ -28,19 +28,18 @@ static const int kMinFramesNeededToScale = 60;  // From quality_scaler.cc.
 static const size_t kDefaultTimeoutMs = 150;
 }  // namespace
 
-#define DO_SYNC(q, block)           \
-  do {                              \
-    rtc::Event event(false, false); \
-    q->PostTask([this, &event] {    \
-      block;                        \
-      event.Set();                  \
-    });                             \
-    RTC_CHECK(event.Wait(1000));    \
+#define DO_SYNC(q, block)        \
+  do {                           \
+    rtc::Event event;            \
+    q->PostTask([this, &event] { \
+      block;                     \
+      event.Set();               \
+    });                          \
+    RTC_CHECK(event.Wait(1000)); \
   } while (0)
 
 class MockAdaptationObserver : public AdaptationObserverInterface {
  public:
-  MockAdaptationObserver() : event(false, false) {}
   virtual ~MockAdaptationObserver() {}
 
   void AdaptUp(AdaptReason r) override {