Replace ASSERT by RTC_DCHECK in all non-test code.

webrtc/base/opensslidentity.h

Index: webrtc/base/opensslidentity.h
diff --git a/webrtc/base/opensslidentity.h b/webrtc/base/opensslidentity.h
index 316572c48bb458f790df03cbacfc7e04e2eb16e9..1c3122b38e0c74ae616557bf50ddc891355b0e82 100644
--- a/webrtc/base/opensslidentity.h
+++ b/webrtc/base/opensslidentity.h
@@ -17,6 +17,7 @@
 #include <memory>
 #include <string>
 
+#include "webrtc/base/checks.h"
 #include "webrtc/base/common.h"
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/base/sslidentity.h"
@@ -30,7 +31,7 @@ namespace rtc {
 class OpenSSLKeyPair {
  public:
   explicit OpenSSLKeyPair(EVP_PKEY* pkey) : pkey_(pkey) {
-    ASSERT(pkey_ != NULL);
+    RTC_DCHECK(pkey_ != NULL);
   }
 
   static OpenSSLKeyPair* Generate(const KeyParams& key_params);