Provide WebVR pose data only to the focused frame.

third_party/WebKit/Source/modules/vr/VRController.h

Index: third_party/WebKit/Source/modules/vr/VRController.h
diff --git a/third_party/WebKit/Source/modules/vr/VRController.h b/third_party/WebKit/Source/modules/vr/VRController.h
index ee0c6fcdd15652224694d6bb84beeb24420f8390..6cc16ec145862997a0b4b362c18b5228b2d3d94b 100644
--- a/third_party/WebKit/Source/modules/vr/VRController.h
+++ b/third_party/WebKit/Source/modules/vr/VRController.h
@@ -38,6 +38,8 @@ class VRController final : public GarbageCollectedFinalized<VRController>,
                           device::mojom::blink::VRDisplayClientRequest,
                           device::mojom::blink::VRDisplayInfoPtr) override;
 
+  void focusChanged(bool focused);

[haraken, 2017/02/03 18:46:18]

Blink prefers using an enum over boolean for function parameters. Would you
switch the boolean in this CL to an enum (Blured/Focused)?

[mthiesse, 2017/02/03 20:47:29]

Got rid of the parameter rather than adding an enum, as the parameter wasn't
useful anyways.

+
   DECLARE_VIRTUAL_TRACE();
 
  private: