(4) Rename files to snake_case: update BUILD.gn, include paths, header guards, and DEPS entries

Mechanically generated by running this command:

tools_webrtc/do-renames.sh update all-renames.txt && git cl format

Then manually updating:

tools_webrtc/sanitizers/tsan_suppressions_webrtc.cc

Bug: webrtc:10159
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I54824cd91dada8fc3ee3d098f971bc319d477833
Reviewed-on: https://webrtc-review.googlesource.com/c/115653
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26226}
diff --git a/sdk/objc/api/peerconnection/RTCFileLogger.mm b/sdk/objc/api/peerconnection/RTCFileLogger.mm
index 9515cfb..ef13023 100644
--- a/sdk/objc/api/peerconnection/RTCFileLogger.mm
+++ b/sdk/objc/api/peerconnection/RTCFileLogger.mm
@@ -13,9 +13,9 @@
 #include <memory>
 
 #include "rtc_base/checks.h"
-#include "rtc_base/filerotatingstream.h"
+#include "rtc_base/file_rotating_stream.h"
+#include "rtc_base/log_sinks.h"
 #include "rtc_base/logging.h"
-#include "rtc_base/logsinks.h"
 
 NSString *const kDefaultLogDirName = @"webrtc_logs";
 NSUInteger const kDefaultMaxFileSize = 10 * 1024 * 1024; // 10MB.