Refactor payload types constants in CallTest

Bug: webrtc:7974
Change-Id: I99e26b76723255731d17b9219f8eb2b37f37ffc9
Reviewed-on: https://webrtc-review.googlesource.com/62343
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22470}
diff --git a/test/call_test.h b/test/call_test.h
index fffd364..aa0d5fd 100644
--- a/test/call_test.h
+++ b/test/call_test.h
@@ -42,17 +42,19 @@
   static const int kDefaultFramerate = 30;
   static const int kDefaultTimeoutMs;
   static const int kLongTimeoutMs;
-  static const uint8_t kVideoSendPayloadType;
-  static const uint8_t kSendRtxPayloadType;
-  static const uint8_t kFakeVideoSendPayloadType;
-  static const uint8_t kRedPayloadType;
-  static const uint8_t kRtxRedPayloadType;
-  static const uint8_t kUlpfecPayloadType;
-  static const uint8_t kFlexfecPayloadType;
-  static const uint8_t kAudioSendPayloadType;
-  static const uint8_t kPayloadTypeH264;
-  static const uint8_t kPayloadTypeVP8;
-  static const uint8_t kPayloadTypeVP9;
+  enum classPayloadTypes : uint8_t {
+    kSendRtxPayloadType = 98,
+    kRtxRedPayloadType = 99,
+    kVideoSendPayloadType = 100,
+    kAudioSendPayloadType = 103,
+    kRedPayloadType = 118,
+    kUlpfecPayloadType = 119,
+    kFlexfecPayloadType = 120,
+    kPayloadTypeH264 = 122,
+    kPayloadTypeVP8 = 123,
+    kPayloadTypeVP9 = 124,
+    kFakeVideoSendPayloadType = 125,
+  };
   static const uint32_t kSendRtxSsrcs[kNumSsrcs];
   static const uint32_t kVideoSendSsrcs[kNumSsrcs];
   static const uint32_t kAudioSendSsrc;