Loosening the coupling between WebRTC and //third_party/protobuf

webrtc/tools/BUILD.gn

Index: webrtc/tools/BUILD.gn
diff --git a/webrtc/tools/BUILD.gn b/webrtc/tools/BUILD.gn
index 169a7f49de9f29b0755e2643e5f73a11aceb8481..510bc693156492d89e7e5e0168cb5697387e3152 100644
--- a/webrtc/tools/BUILD.gn
+++ b/webrtc/tools/BUILD.gn
@@ -202,6 +202,7 @@ if (rtc_enable_protobuf) {
     }
     defines = [ "ENABLE_RTC_EVENT_LOG" ]
     deps = [
+      "../base:protobuf_utils",
       "../call:call_interfaces",
       "../logging:rtc_event_log_impl",
       "../logging:rtc_event_log_parser",
@@ -238,6 +239,7 @@ if (rtc_include_tests) {
       defines = [ "ENABLE_RTC_EVENT_LOG" ]
       deps = [
         ":event_log_visualizer_utils",
+        "../base:protobuf_utils",
         "../test:field_trial",
         "//third_party/gflags",
       ]
@@ -329,6 +331,7 @@ if (rtc_include_tests) {
         "$root_build_dir/{{source_file_part}}",
       ]
       deps = [
+        "../base:protobuf_utils",
         "../logging:rtc_event_log_proto",
       ]
     }