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

webrtc/common_audio/vad/vad_unittest.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 48 matching lines @@
   // This API test runs through the APIs for all possible valid and invalid
   // combinations.
 
   VadInst* handle = WebRtcVad_Create();
   int16_t zeros[kMaxFrameLength] = { 0 };
 
   // Construct a speech signal that will trigger the VAD in all modes. It is
   // 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
   EXPECT_EQ(-1, WebRtcVad_Init(nullptr));
   EXPECT_EQ(-1, WebRtcVad_set_mode(nullptr, kModes[0]));
   EXPECT_EQ(-1,
             WebRtcVad_Process(nullptr, kRates[0], speech, kFrameLengths[0]));
 
   // WebRtcVad_Create()
   CHECK(handle);
@@ skipping 67 matching lines @@
         EXPECT_EQ(-1, WebRtcVad_ValidRateAndFrameLength(kRates[i],
                                                         kFrameLengths[j]));
       }
     }
   }
 }
 
 // TODO(bjornv): Add a process test, run on file.
 
 }  // namespace