GN: Refactor so that WebRTC compiles with rtc_enable_protobuf=false.

webrtc/tools/BUILD.gn

Index: webrtc/tools/BUILD.gn
diff --git a/webrtc/tools/BUILD.gn b/webrtc/tools/BUILD.gn
index 266f6690c5fd93b7115959ac3601e6890cd84fdc..6dc370858c9901e484b2c31fcd79dc279d51e141 100644
--- a/webrtc/tools/BUILD.gn
+++ b/webrtc/tools/BUILD.gn
@@ -30,11 +30,13 @@ group("tools") {
   if (rtc_include_tests) {
     public_deps += [
       ":activity_metric",
-      ":rtp_analyzer",
       ":tools_unittests",
     ]
     if (rtc_enable_protobuf) {
-      public_deps += [ ":event_log_visualizer" ]
+      public_deps += [
+        ":event_log_visualizer",
+        ":rtp_analyzer",
+      ]
     }
   }
 }