In https://codereview.webrtc.org/2034923003 it was discovered that a test binary rtc_sdk_peerconnection_objc_tests was a dependency to rtc_unittests. Unfortunately gtest doesn't include dependent executables into the same test executable; only libraries (so theses tests weren't run). This CL incorporates those tests into rtc_unittests and does the same changes to the GN build. BUG=webrtc:5949 TESTED=Built and ran rtc_unittests locally on Mac. NOTRY=True Review-Url: https://codereview.webrtc.org/2041743003 Cr-Commit-Position: refs/heads/master@{#13060}