commit 84df1c724e91af36569e6cf9aa9e6a4345746c2b
author Jonas Olsson <jonasolsson@webrtc.org> Fri Sep 14 14:59:32 2018
committer Commit Bot <commit-bot@chromium.org> Mon Sep 24 09:39:19 2018
tree 228b433c56964d56b6ae4583299bd5922e4bfc67
parent 4e5342f06ae3aed3f7432ed14b31fb678d09db50

Make fewer copies when using StringBuilder.

Replace calls to .str() which copies with .Release which moves in cases where that's safe.

This CL was generated by this command:
git grep -l 'StringBuilder' |
xargs perl -i -0 -pe "s/(rtc::StringBuilder (\S+);.*?return )\\g2.str\(\)/\$1\$2.Release\(\)/sg"

Bug: webrtc:8982
Change-Id: If4dadbeb039df010aaaa9e58da81c1971a84fe8f
Reviewed-on: https://webrtc-review.googlesource.com/100307
Commit-Queue: Jonas Olsson <jonasolsson@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24790}

api/candidate.cc

diff --git a/api/candidate.cc b/api/candidate.cc
index 128c470..c2c6c53 100644
--- a/api/candidate.cc
+++ b/api/candidate.cc
@@ -78,7 +78,7 @@
       << ":" << related_address_.ToString() << ":" << username_ << ":"
       << password_ << ":" << network_id_ << ":" << network_cost_ << ":"
       << generation_ << "]";
-  return ost.str();
+  return ost.Release();
 }
 
 uint32_t Candidate::GetPriority(uint32_t type_preference,

api/test/videocodec_test_stats.cc

diff --git a/api/test/videocodec_test_stats.cc b/api/test/videocodec_test_stats.cc
index 78c39d0..8a935f3 100644
--- a/api/test/videocodec_test_stats.cc
+++ b/api/test/videocodec_test_stats.cc
@@ -36,7 +36,7 @@
   ss << " decode_time_us " << decode_time_us;
   ss << " rtp_timestamp " << rtp_timestamp;
   ss << " target_bitrate_kbps " << target_bitrate_kbps;
-  return ss.str();
+  return ss.Release();
 }
 
 VideoCodecTestStats::VideoStatistics::VideoStatistics() = default;
@@ -83,7 +83,7 @@
   ss << "\n" << prefix << "num_key_frames: " << num_key_frames;
   ss << "\n" << prefix << "num_spatial_resizes: " << num_spatial_resizes;
   ss << "\n" << prefix << "max_nalu_size_bytes: " << max_nalu_size_bytes;
-  return ss.str();
+  return ss.Release();
 }
 
 VideoCodecTestStats::FrameStatistics::FrameStatistics(size_t frame_number,