Rename webrtc/base -> webrtc/rtc_base

NOPRESUBMIT=True # cpplint errors that aren't caused by this CL.
NOTRY=True
NOTREECHECKS=True
TBR=kwiberg@webrtc.org, kjellander@webrtc.org

Bug: webrtc:7634
Change-Id: I3cca0fbaa807b563c95979cccd6d1bec32055f36
Reviewed-on: https://chromium-review.googlesource.com/562156
Commit-Queue: Edward Lemur <ehmaldonado@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#18919}
diff --git a/webrtc/rtc_tools/event_log_visualizer/main.cc b/webrtc/rtc_tools/event_log_visualizer/main.cc
index 6ceeeec..6e78c89 100644
--- a/webrtc/rtc_tools/event_log_visualizer/main.cc
+++ b/webrtc/rtc_tools/event_log_visualizer/main.cc
@@ -10,8 +10,8 @@
 
 #include <iostream>
 
-#include "webrtc/base/flags.h"
 #include "webrtc/logging/rtc_event_log/rtc_event_log_parser.h"
+#include "webrtc/rtc_base/flags.h"
 #include "webrtc/rtc_tools/event_log_visualizer/analyzer.h"
 #include "webrtc/rtc_tools/event_log_visualizer/plot_base.h"
 #include "webrtc/rtc_tools/event_log_visualizer/plot_python.h"