message: Minor refactoring in TFLite DEPTHWISE_CONV_2D
  Rename hasBias -> has_bias to conform to Google style
diff: @@ -98,9 +98,9 @@ TfLiteStatus Prepare(TfLiteContext* context, TfLiteNode* node) {
  reinterpret_cast<TfLiteDepthwiseConvParams*>(node->builtin_data);
  OpData* data = reinterpret_cast<OpData*>(node->user_data);
  - bool hasBias = NumInputs(node) == 3;
  + bool has_bias = NumInputs(node) == 3;
  - TF_LITE_ENSURE(context, hasBias || NumInputs(node) == 2);
  + TF_LITE_ENSURE(context, has_bias || NumInputs(node) == 2);
  const TfLiteTensor* input;
  TF_LITE_ENSURE_OK(context, GetInputSafe(context, node, kInputTensor, &input));
  const TfLiteTensor* filter;
  @@ -138,7 +138,7 @@ TfLiteStatus Prepare(TfLiteContext* context, TfLiteNode* node) {
  // Filter in DepthwiseConv is expected to be [1, H, W, O].
  TF_LITE_ENSURE_EQ(context, SizeOfDimension(filter, 0), 1);
  - if (hasBias) {
  + if (has_bias) {
  TF_LITE_ENSURE_OK(context, GetInputSafe(context, node, kBiasTensor, &bias));
  if (data_type == kTfLiteUInt8 || data_type == kTfLiteInt8) {
  TF_LITE_ENSURE_TYPES_EQ(context, bias->type, kTfLiteInt32);
  