message: Double the tolerance in nn_grad_test to avoid flakes.
diff: @@ -36,7 +36,7 @@ class NNGradTest : public ::testing::Test {
  float max_error;
  TF_ASSERT_OK(ComputeGradientError(scope_, {x}, {x_shape}, {y}, {y_shape},
  &max_error));
  - EXPECT_LT(max_error, 1e-4);
  + EXPECT_LT(max_error, 2e-4);
  }
  void RunTest(const Output& x, const Tensor& x_init_value, const Output& y,
  @@ -44,7 +44,7 @@ class NNGradTest : public ::testing::Test {
  float max_error;
  TF_ASSERT_OK(
  ComputeGradientError(scope_, x, x_init_value, y, y_shape, &max_error));
  - EXPECT_LT(max_error, 1e-4);
  + EXPECT_LT(max_error, 2e-4);
  }
  void RunTest(const OutputList& xs, const std::vector<TensorShape>& x_shapes,
  @@ -53,7 +53,7 @@ class NNGradTest : public ::testing::Test {
  float max_error;
  TF_ASSERT_OK(
  ComputeGradientError(scope_, xs, x_shapes, ys, y_shapes, &max_error));
  - EXPECT_LT(max_error, 1e-4);
  + EXPECT_LT(max_error, 2e-4);
  }
  Scope scope_;
  