Remove CircularFileStream / replace it with CallSessionFileRotatingStream.

webrtc/base/filerotatingstream.cc

 /*
  *  Copyright 2015 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 159 matching lines @@
   return result;
 }
 
 bool FileRotatingStream::Flush() {
   if (!file_stream_) {
     return false;
   }
   return file_stream_->Flush();
 }
 
+bool FileRotatingStream::GetSize(size_t* size) const {
+  if (mode_ != kRead) {
+    // Not possible to get accurate size on disk when writing because of
+    // potential buffering.
+    return false;
+  }
+  DCHECK(size);
+  *size = 0;
+  size_t total_size = 0;
+  for (auto file_name : file_names_) {
+    Pathname pathname(file_name);
+    size_t file_size = 0;
+    if (Filesystem::GetFileSize(file_name, &file_size)) {
+      total_size += file_size;
+    }
+  }
+  *size = total_size;
+  return true;
+}
+
 void FileRotatingStream::Close() {
   CloseCurrentFile();
 }
 
 bool FileRotatingStream::Open() {
   switch (mode_) {
     case kRead:
       // Defer opening to when we first read since we want to return read error
       // if we fail to open next file.
       return true;
@@ skipping 181 matching lines @@
 
 size_t CallSessionFileRotatingStream::GetNumRotatingLogFiles(
     size_t max_total_log_size) {
   // At minimum have two rotating files. Otherwise split the available log size
   // evenly across 1MB files.
   return std::max((size_t)2,
                   (max_total_log_size / 2) / kRotatingLogFileDefaultSize);
 }
 
 }  // namespace rtc