In rtc_base/ and api/ replace mock macros with unified MOCK_METHOD macro

Bug: webrtc:11564
Change-Id: I8f4171490df39c683276f9d401a4083962ee409a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/175130
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31266}

rtc_base/ssl_adapter_unittest.cc

diff --git a/rtc_base/ssl_adapter_unittest.cc b/rtc_base/ssl_adapter_unittest.cc
index 125b4bd..498eba3 100644
--- a/rtc_base/ssl_adapter_unittest.cc
+++ b/rtc_base/ssl_adapter_unittest.cc
@@ -50,7 +50,7 @@
 class MockCertVerifier : public rtc::SSLCertificateVerifier {
  public:
   virtual ~MockCertVerifier() = default;
-  MOCK_METHOD1(Verify, bool(const rtc::SSLCertificate&));
+  MOCK_METHOD(bool, Verify, (const rtc::SSLCertificate&), (override));
 };
 
 // TODO(benwright) - Move to using INSTANTIATE_TEST_SUITE_P instead of using