Speculative fix for division by zero in Vp8EncoderImpl.

webrtc/common_types.h

 /*
  *  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 619 matching lines @@
   unsigned char plType;
 
   unsigned short width;
   unsigned short height;
 
   unsigned int startBitrate;   // kilobits/sec.
   unsigned int maxBitrate;     // kilobits/sec.
   unsigned int minBitrate;     // kilobits/sec.
   unsigned int targetBitrate;  // kilobits/sec.
 
-  unsigned char maxFramerate;
+  uint32_t maxFramerate;
 
   unsigned int qpMax;
   unsigned char numberOfSimulcastStreams;
   SimulcastStream simulcastStream[kMaxSimulcastStreams];
   SpatialLayer spatialLayers[kMaxSpatialLayers];
 
   VideoCodecMode mode;
   bool expect_encode_from_texture;
 
   bool operator==(const VideoCodec& other) const = delete;
@@ skipping 247 matching lines @@
 enum class RtcpMode { kOff, kCompound, kReducedSize };
 
 enum NetworkState {
   kNetworkUp,
   kNetworkDown,
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_COMMON_TYPES_H_