VR: Refresh controller handedness when resuming the controller.

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..74aa9ec9498aaf40d493c6b0d38b9c2be12021fb 100644
--- a/chrome/browser/android/vr_shell/elbow_model.cc
+++ b/chrome/browser/android/vr_shell/elbow_model.cc
@@ -32,13 +32,16 @@ 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} {}
+    : alpha_value_(1.0f), torso_direction_{0.0f, 0.0f, 0.0f} {
+  UpdateHandedness(handedness);
+}
 
 ElbowModel::~ElbowModel() = default;
 
-void ElbowModel::UpdateHandedness() {
+void ElbowModel::UpdateHandedness(gvr::ControllerHandedness handedness) {
+  if (handedness == handedness_)

[acondor_, 2017/05/02 14:18:34]

We might need an invalid default handedness value so this is always false on
construction.

[mthiesse, 2017/05/02 15:23:37]

Done.

+    return;
+  handedness_ = handedness;
   handed_multiplier_ = {
       handedness_ == GVR_CONTROLLER_RIGHT_HANDED ? 1.0f : -1.0f, 1.0f, 1.0f};
   shoulder_rotation_ = kNoRotation;
@@ -47,7 +50,6 @@ void ElbowModel::UpdateHandedness() {
 }
 
 void ElbowModel::Update(const UpdateData& update) {
-  UpdateHandedness();
   UpdateTorsoDirection(update);
   ApplyArmModel(update);
   UpdateTransparency(update);