Replace more instances of rtc::RefCountedObject with make_ref_counted.

This is essentially replacing `new rtc::RefCountedObject` with
`rtc::make_ref_counted` in many files. In a couple of places I
made minor tweaks to make things compile such as adding parenthesis
when they were missing.

Bug: webrtc:12701
Change-Id: I3828dbf3ee0eb0232f3a47067474484ac2f4aed2
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/215973
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Tommi <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33852}

pc/jitter_buffer_delay_unittest.cc

@@ -31,8 +31,8 @@ namespace webrtc {
 class JitterBufferDelayTest : public ::testing::Test {
  public:
   JitterBufferDelayTest()
-      : delay_(new rtc::RefCountedObject<JitterBufferDelay>(
-            rtc::Thread::Current())) {}
+      : delay_(
+            rtc::make_ref_counted<JitterBufferDelay>(rtc::Thread::Current())) {}
 
  protected:
   rtc::scoped_refptr<JitterBufferDelayInterface> delay_;