Loosening the coupling between WebRTC and //third_party/protobuf

webrtc/logging/rtc_event_log/rtc_event_log_parser.cc

Index: webrtc/logging/rtc_event_log/rtc_event_log_parser.cc
diff --git a/webrtc/logging/rtc_event_log/rtc_event_log_parser.cc b/webrtc/logging/rtc_event_log/rtc_event_log_parser.cc
index a806b3db0e663149c1157a7833fb306304210847..72faa27b4982d5952a07a2e0915e319384097f7d 100644
--- a/webrtc/logging/rtc_event_log/rtc_event_log_parser.cc
+++ b/webrtc/logging/rtc_event_log/rtc_event_log_parser.cc
@@ -20,6 +20,7 @@
 
 #include "webrtc/base/checks.h"
 #include "webrtc/base/logging.h"
+#include "webrtc/base/protobuf_utils.h"
 #include "webrtc/call/call.h"
 #include "webrtc/logging/rtc_event_log/rtc_event_log.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
@@ -127,8 +128,8 @@ std::pair<uint64_t, bool> ParseVarInt(std::istream& stream) {
 
 void GetHeaderExtensions(
     std::vector<RtpExtension>* header_extensions,
-    const google::protobuf::RepeatedPtrField<rtclog::RtpHeaderExtension>&
-        proto_header_extensions) {
+    const RepeatedPtrField<rtclog::RtpHeaderExtension>&
+    proto_header_extensions) {
   header_extensions->clear();
   for (auto& p : proto_header_extensions) {
     RTC_CHECK(p.has_name());