Create tool to print statistics about the file size usage of an RTC event log.

webrtc/logging/BUILD.gn

Index: webrtc/logging/BUILD.gn
diff --git a/webrtc/logging/BUILD.gn b/webrtc/logging/BUILD.gn
index 6fcab59435a053a183a0ec73d4438b9d03df387e..222b226507c24deb88da8872ad5da83e0c8a7ef1 100644
--- a/webrtc/logging/BUILD.gn
+++ b/webrtc/logging/BUILD.gn
@@ -173,4 +173,23 @@ if (rtc_enable_protobuf) {
       }
     }
   }
+  if (rtc_include_tests) {
+    rtc_executable("rtc_event_log2stats") {
+      testonly = true
+      sources = [
+        "rtc_event_log/rtc_event_log2stats.cc",
+      ]
+      deps = [
+        ":rtc_event_log_api",
+        ":rtc_event_log_impl",
+        ":rtc_event_log_proto",
+        "../base:rtc_base_approved",
+        "//third_party/gflags",
+      ]
+      if (!build_with_chromium && is_clang) {
+        # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
+        suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
+      }
+    }
+  }
 }