Hooked up RtcEventLog. It lives in Voice Engine and pointers are propagated to ACM and Call.

webrtc/voice_engine/voice_engine.gyp

Index: webrtc/voice_engine/voice_engine.gyp
diff --git a/webrtc/voice_engine/voice_engine.gyp b/webrtc/voice_engine/voice_engine.gyp
index ad4a625aa0bdf56bb8c5082a559dc4b1a5b97e2f..2529237ba82841ef5da4c784178a132eae3b78e8 100644
--- a/webrtc/voice_engine/voice_engine.gyp
+++ b/webrtc/voice_engine/voice_engine.gyp
@@ -26,6 +26,7 @@
         '<(webrtc_root)/modules/modules.gyp:rtp_rtcp',
         '<(webrtc_root)/modules/modules.gyp:webrtc_utility',
         '<(webrtc_root)/system_wrappers/system_wrappers.gyp:system_wrappers',
+        '<(webrtc_root)/webrtc.gyp:rtc_event_log',
       ],
       'sources': [
         'include/voe_audio_processing.h',
@@ -153,6 +154,7 @@
             '<(webrtc_root)/system_wrappers/system_wrappers.gyp:system_wrappers_default',
             '<(webrtc_root)/test/test.gyp:channel_transport',
             '<(webrtc_root)/test/test.gyp:test_support',
+            '<(webrtc_root)/webrtc.gyp:rtc_event_log',
            ],
           'sources': [
             'test/auto_test/automated_mode.cc',
@@ -206,6 +208,11 @@
                 'test/auto_test/standard/hardware_before_streaming_test.cc',
               ],
             }],
+            ['enable_protobuf==1', {
+              'defines': [
+                'ENABLE_RTC_EVENT_LOG',
+              ],
+            }],
           ],
           # Disable warnings to enable Win64 build, issue 1323.
           'msvs_disabled_warnings': [
@@ -224,6 +231,7 @@
             '<(webrtc_root)/system_wrappers/system_wrappers.gyp:system_wrappers_default',
             '<(webrtc_root)/test/test.gyp:channel_transport',
             '<(webrtc_root)/test/test.gyp:test_support',
+            '<(webrtc_root)/webrtc.gyp:rtc_event_log',
           ],
           'sources': [
             'test/cmd_test/voe_cmd_test.cc',