webrtc: Remove semicolons.

Bug: chromium:926235
Change-Id: I66c10ab3df38adf87152d1f18cc8162afedca7e4
Reviewed-on: https://webrtc-review.googlesource.com/c/123560
Commit-Queue: Tommi <tommi@webrtc.org>
Reviewed-by: Tommi <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26780}

test/fake_encoder.cc

@@ -45,7 +45,7 @@ void WriteCounter(unsigned char* payload, uint32_t counter) {
   payload[3] = (counter & 0xFF000000) >> 24;
 }
 
-};  // namespace
+}  // namespace
 
 FakeEncoder::FakeEncoder(Clock* clock)
     : clock_(clock),