Add RTC_ prefix to (D)CHECKs and related macros.

talk/app/webrtc/webrtcsession_unittest.cc

Index: talk/app/webrtc/webrtcsession_unittest.cc
diff --git a/talk/app/webrtc/webrtcsession_unittest.cc b/talk/app/webrtc/webrtcsession_unittest.cc
index ef4d33f07434d1e95435cb6a0dbea565966f59b2..b84e6fb8ad68a9cdb5d86e8228a5427de54f6f99 100644
--- a/talk/app/webrtc/webrtcsession_unittest.cc
+++ b/talk/app/webrtc/webrtcsession_unittest.cc
@@ -424,7 +424,7 @@ class WebRtcSessionTest
       dtls_identity_store.reset(new FakeDtlsIdentityStore());
       dtls_identity_store->set_should_fail(false);
     } else {
-      CHECK(false);
+      RTC_CHECK(false);
     }
     Init(dtls_identity_store.Pass(), configuration);
   }
@@ -1237,7 +1237,7 @@ class WebRtcSessionTest
 
   void VerifyMultipleAsyncCreateDescriptionAfterInit(
       bool success, CreateSessionDescriptionRequest::Type type) {
-    CHECK(session_);
+    RTC_CHECK(session_);
     SetFactoryDtlsSrtp();
     if (type == CreateSessionDescriptionRequest::kAnswer) {
       cricket::MediaSessionOptions options;