Fix controller positioning in VrShell when gyro reads are small

chrome/browser/android/vr_shell/elbow_model.cc

Index: chrome/browser/android/vr_shell/elbow_model.cc
diff --git a/chrome/browser/android/vr_shell/elbow_model.cc b/chrome/browser/android/vr_shell/elbow_model.cc
index f71ece01a3eaa3a2a2ab7f61fe625a0307d112cf..f2cd825af75f56f90515bedbbf356bf0e49d46ee 100644
--- a/chrome/browser/android/vr_shell/elbow_model.cc
+++ b/chrome/browser/android/vr_shell/elbow_model.cc
@@ -32,9 +32,7 @@ constexpr float kDefaultElbowRotationRatio = 0.4f;
 }  // namespace
 
 ElbowModel::ElbowModel(gvr::ControllerHandedness handedness)
-    : handedness_(handedness),
-      alpha_value_(1.0f),
-      torso_direction_{0.0f, 0.0f, 0.0f} {}
+    : handedness_(handedness), alpha_value_(1.0f), torso_direction_(kForward) {}
 
 ElbowModel::~ElbowModel() = default;