Miscellaneous changes split from https://codereview.webrtc.org/1230503003 .

webrtc/common_audio/vad/vad_unittest.cc

Index: webrtc/common_audio/vad/vad_unittest.cc
diff --git a/webrtc/common_audio/vad/vad_unittest.cc b/webrtc/common_audio/vad/vad_unittest.cc
index 2c3e803cb60221d395ced9cb7dd7a41bcab43f64..48eddbf935e5ab34cf91446756370500359e78e5 100644
--- a/webrtc/common_audio/vad/vad_unittest.cc
+++ b/webrtc/common_audio/vad/vad_unittest.cc
@@ -66,7 +66,7 @@ TEST_F(VadTest, ApiTest) {
   // known that (i * i) will wrap around, but that doesn't matter in this case.
   int16_t speech[kMaxFrameLength];
   for (int16_t i = 0; i < kMaxFrameLength; i++) {
-    speech[i] = (i * i);
+    speech[i] = static_cast<int16_t>(i * i);
   }
 
   // nullptr instance tests