Fix -Wextra-semi warnings.

Starting from https://chromium-review.googlesource.com/c/1485012,
-Wextra-semi is enabled and WebRTC has some violations to fix.

This is a follow-up of https://webrtc-review.googlesource.com/c/123560.

Bug: webrtc:10355
Change-Id: I012b7497fc8991037fd77aa98f1579c22e08206f
Reviewed-on: https://webrtc-review.googlesource.com/c/124126
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26831}
diff --git a/modules/audio_coding/acm2/audio_coding_module_unittest.cc b/modules/audio_coding/acm2/audio_coding_module_unittest.cc
index a609f98..edaf798 100644
--- a/modules/audio_coding/acm2/audio_coding_module_unittest.cc
+++ b/modules/audio_coding/acm2/audio_coding_module_unittest.cc
@@ -1484,7 +1484,7 @@
         "ab88b1a049c36bdfeb7e8b057ef6982a",
         "27fef7b799393347ec3b5694369a1c36",
         "27fef7b799393347ec3b5694369a1c36");
-};  // namespace
+}  // namespace
 
 TEST_F(AcmSenderBitExactnessOldApi, Opus_stereo_20ms) {
   ASSERT_NO_FATAL_FAILURE(SetUpTest("opus", 48000, 2, 120, 960, 960));
diff --git a/modules/audio_coding/codecs/opus/opus_speed_test.cc b/modules/audio_coding/codecs/opus/opus_speed_test.cc
index bf757f6..1a629a8 100644
--- a/modules/audio_coding/codecs/opus/opus_speed_test.cc
+++ b/modules/audio_coding/codecs/opus/opus_speed_test.cc
@@ -96,17 +96,17 @@
     EncodeDecode(kDurationSec);                                        \
   }
 
-ADD_TEST(10);
-ADD_TEST(9);
-ADD_TEST(8);
-ADD_TEST(7);
-ADD_TEST(6);
-ADD_TEST(5);
-ADD_TEST(4);
-ADD_TEST(3);
-ADD_TEST(2);
-ADD_TEST(1);
-ADD_TEST(0);
+ADD_TEST(10)
+ADD_TEST(9)
+ADD_TEST(8)
+ADD_TEST(7)
+ADD_TEST(6)
+ADD_TEST(5)
+ADD_TEST(4)
+ADD_TEST(3)
+ADD_TEST(2)
+ADD_TEST(1)
+ADD_TEST(0)
 
 #define ADD_BANDWIDTH_TEST(bandwidth)                                \
   TEST_P(OpusSpeedTest, OpusSetBandwidthTest##bandwidth) {           \
@@ -116,11 +116,11 @@
     EncodeDecode(kDurationSec);                                      \
   }
 
-ADD_BANDWIDTH_TEST(OPUS_BANDWIDTH_NARROWBAND);
-ADD_BANDWIDTH_TEST(OPUS_BANDWIDTH_MEDIUMBAND);
-ADD_BANDWIDTH_TEST(OPUS_BANDWIDTH_WIDEBAND);
-ADD_BANDWIDTH_TEST(OPUS_BANDWIDTH_SUPERWIDEBAND);
-ADD_BANDWIDTH_TEST(OPUS_BANDWIDTH_FULLBAND);
+ADD_BANDWIDTH_TEST(OPUS_BANDWIDTH_NARROWBAND)
+ADD_BANDWIDTH_TEST(OPUS_BANDWIDTH_MEDIUMBAND)
+ADD_BANDWIDTH_TEST(OPUS_BANDWIDTH_WIDEBAND)
+ADD_BANDWIDTH_TEST(OPUS_BANDWIDTH_SUPERWIDEBAND)
+ADD_BANDWIDTH_TEST(OPUS_BANDWIDTH_FULLBAND)
 
 // List all test cases: (channel, bit rat, filename, extension).
 const coding_param param_set[] = {
diff --git a/modules/audio_coding/neteq/tools/neteq_quality_test.h b/modules/audio_coding/neteq/tools/neteq_quality_test.h
index f618c0d..82a6a64 100644
--- a/modules/audio_coding/neteq/tools/neteq_quality_test.h
+++ b/modules/audio_coding/neteq/tools/neteq_quality_test.h
@@ -34,7 +34,7 @@
 
 class LossModel {
  public:
-  virtual ~LossModel(){};
+  virtual ~LossModel() {}
   virtual bool Lost(int now_ms) = 0;
 };
 
diff --git a/modules/audio_coding/test/EncodeDecodeTest.h b/modules/audio_coding/test/EncodeDecodeTest.h
index d9c22d7..cdfc706 100644
--- a/modules/audio_coding/test/EncodeDecodeTest.h
+++ b/modules/audio_coding/test/EncodeDecodeTest.h
@@ -65,7 +65,7 @@
 class Receiver {
  public:
   Receiver();
-  virtual ~Receiver() {};
+  virtual ~Receiver() {}
   void Setup(AudioCodingModule *acm, RTPStream *rtpStream,
              std::string out_file_name, size_t channels, int file_num);
   void Teardown();
diff --git a/modules/audio_device/linux/audio_device_alsa_linux.cc b/modules/audio_device/linux/audio_device_alsa_linux.cc
index 292193d..ecf2963 100644
--- a/modules/audio_device/linux/audio_device_alsa_linux.cc
+++ b/modules/audio_device/linux/audio_device_alsa_linux.cc
@@ -50,7 +50,7 @@
                             const char* function,
                             int err,
                             const char* fmt,
-                            ...){};
+                            ...) {}
 
 namespace webrtc {
 static const unsigned int ALSA_PLAYOUT_FREQ = 48000;
diff --git a/modules/audio_device/linux/audio_device_alsa_linux.h b/modules/audio_device/linux/audio_device_alsa_linux.h
index 69e6e50..d5202fb 100644
--- a/modules/audio_device/linux/audio_device_alsa_linux.h
+++ b/modules/audio_device/linux/audio_device_alsa_linux.h
@@ -131,8 +131,8 @@
 
   bool KeyPressed() const;
 
-  void Lock() RTC_EXCLUSIVE_LOCK_FUNCTION(_critSect) { _critSect.Enter(); };
-  void UnLock() RTC_UNLOCK_FUNCTION(_critSect) { _critSect.Leave(); };
+  void Lock() RTC_EXCLUSIVE_LOCK_FUNCTION(_critSect) { _critSect.Enter(); }
+  void UnLock() RTC_UNLOCK_FUNCTION(_critSect) { _critSect.Leave(); }
 
   inline int32_t InputSanityCheckAfterUnlockedPeriod() const;
   inline int32_t OutputSanityCheckAfterUnlockedPeriod() const;
diff --git a/modules/audio_processing/aec3/echo_canceller3_unittest.cc b/modules/audio_processing/aec3/echo_canceller3_unittest.cc
index 3f1e059..267213e 100644
--- a/modules/audio_processing/aec3/echo_canceller3_unittest.cc
+++ b/modules/audio_processing/aec3/echo_canceller3_unittest.cc
@@ -104,7 +104,7 @@
 
   void GetMetrics(EchoControl::Metrics* metrics) const override {}
 
-  void SetAudioBufferDelay(size_t delay_ms) override{};
+  void SetAudioBufferDelay(size_t delay_ms) override {}
 
  private:
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(CaptureTransportVerificationProcessor);
@@ -134,7 +134,7 @@
 
   void GetMetrics(EchoControl::Metrics* metrics) const override {}
 
-  void SetAudioBufferDelay(size_t delay_ms) override{};
+  void SetAudioBufferDelay(size_t delay_ms) override {}
 
  private:
   std::deque<std::vector<std::vector<float>>> received_render_blocks_;
diff --git a/modules/audio_processing/audio_processing_impl_unittest.cc b/modules/audio_processing/audio_processing_impl_unittest.cc
index abceeec..69fc779 100644
--- a/modules/audio_processing/audio_processing_impl_unittest.cc
+++ b/modules/audio_processing/audio_processing_impl_unittest.cc
@@ -133,7 +133,7 @@
       std::transform(channel_view.begin(), channel_view.end(),
                      channel_view.begin(), ProcessSample);
     }
-  };
+  }
   std::string ToString() const override { return "TestRenderPreProcessor"; }
   void SetRuntimeSetting(AudioProcessing::RuntimeSetting setting) override {}
   // Modifies a sample. This member is used in Process() to modify a frame and
diff --git a/modules/video_coding/generic_encoder_unittest.cc b/modules/video_coding/generic_encoder_unittest.cc
index 0be0c75..5324d5e 100644
--- a/modules/video_coding/generic_encoder_unittest.cc
+++ b/modules/video_coding/generic_encoder_unittest.cc
@@ -42,7 +42,7 @@
         encoded_image.timing_.flags != VideoSendTiming::kNotTriggered;
     last_capture_timestamp_ = encoded_image.capture_time_ms_;
     return Result(Result::OK);
-  };
+  }
 
   void OnDroppedFrame(DropReason reason) override { ++num_frames_dropped_; }