Remove empty-string comparisons.

webrtc/modules/remote_bitrate_estimator/test/bwe_test_logging.cc

 /*
  *  Copyright (c) 2013 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 98 matching lines @@
 Logging::State::State() : tag(""), timestamp_ms(0), enabled(true) {}
 
 Logging::State::State(const std::string& tag, int64_t timestamp_ms,
                       bool enabled)
     : tag(tag),
       timestamp_ms(timestamp_ms),
       enabled(enabled) {
 }
 
 void Logging::State::MergePrevious(const State& previous) {
-  if (tag == "") {
+  if (tag.empty()) {
     tag = previous.tag;
-  } else if (previous.tag != "") {
+  } else if (!previous.tag.empty()) {
     tag = previous.tag + "_" + tag;
   }
   timestamp_ms = std::max(previous.timestamp_ms, timestamp_ms);
   enabled = previous.enabled && enabled;
 }
 
 void Logging::PushState(const std::string& append_to_tag, int64_t timestamp_ms,
                         bool enabled) {
   CriticalSectionScoped cs(crit_sect_.get());
   State new_state(append_to_tag, timestamp_ms, enabled);
@@ skipping 19 matching lines @@
     // Update time so that next log/plot will use the latest time seen so far
     // in this call tree.
     state->timestamp_ms = std::max(state->timestamp_ms, newest_timestamp_ms);
   }
 }
 }  // namespace bwe
 }  // namespace testing
 }  // namespace webrtc
 
 #endif  // BWE_TEST_LOGGING_COMPILE_TIME_ENABLE