Concatenate string literals at compile time.

This CL was generated by running:
git ls-files | grep ".cc" | xargs perl -i -ne 'BEGIN {undef $/}; s/("[\s\n]*<<[\s\n]*")/" "/g; print;'; git cl format

After that I manually edited modules/audio_processing/gain_controller2.cc to preserve its original
formatting.

This primary benefit of this change is a small reduction in binary size.

Bug: None
Change-Id: I689fa7ba9c717c314bb167e5d592c3c4e0871e29
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/165961
Reviewed-by: Alessio Bazzica <alessiob@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Jonas Olsson <jonasolsson@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30251}

modules/video_coding/receiver.cc

@@ -114,7 +114,8 @@ VCMEncodedFrame* VCMReceiver::FrameForDecoding(uint16_t max_wait_time_ms,
     int frame_delay = static_cast<int>(std::abs(render_time_ms - now_ms));
     RTC_LOG(LS_WARNING)
         << "A frame about to be decoded is out of the configured "
-        << "delay bounds (" << frame_delay << " > " << max_video_delay_ms_
+           "delay bounds ("
+        << frame_delay << " > " << max_video_delay_ms_
         << "). Resetting the video jitter buffer.";
     timing_error = true;
   } else if (static_cast<int>(timing_->TargetVideoDelay()) >