Remove mutable from rtc::CriticalSection members.

talk/app/webrtc/test/fakeaudiocapturemodule_unittest.cc

 /*
  * libjingle
  * Copyright 2012 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 108 matching lines @@
     memset(audio_buffer, 0, audio_buffer_size);
     return audio_buffer_size;
   }
   size_t CopyFromRecBuffer(void* audio_buffer, size_t audio_buffer_size) {
     EXPECT_EQ(audio_buffer_size, rec_buffer_bytes_);
     const size_t min_buffer_size = min(audio_buffer_size, rec_buffer_bytes_);
     memcpy(audio_buffer, rec_buffer_, min_buffer_size);
     return min_buffer_size;
   }
 
-  mutable rtc::CriticalSection crit_;
+  rtc::CriticalSection crit_;
 
   int push_iterations_;
   int pull_iterations_;
 
   char rec_buffer_[FakeAudioCaptureModule::kNumberSamples *
                    FakeAudioCaptureModule::kNumberBytesPerSample];
   size_t rec_buffer_bytes_;
 };
 
 TEST_F(FakeAdmTest, TestProccess) {
@@ skipping 67 matching lines @@
 
   EXPECT_EQ(0, fake_audio_capture_module_->InitRecording());
   EXPECT_EQ(0, fake_audio_capture_module_->StartRecording());
 
   EXPECT_TRUE_WAIT(push_iterations() > 0, kMsInSecond);
   EXPECT_TRUE_WAIT(pull_iterations() > 0, kMsInSecond);
 
   EXPECT_EQ(0, fake_audio_capture_module_->StopPlayout());
   EXPECT_EQ(0, fake_audio_capture_module_->StopRecording());
 }