Removing Blink>WebVR component and assigning to Blink>WebXR 

Removing Blink>WebVR component and assigning to Blink>WebXR 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d77c4d66e0be7835b93fea326e283a1789cb033a

commit d77c4d66e0be7835b93fea326e283a1789cb033a
Author: Max Rebuschatis <lincolnfrog@chromium.org>
Date: Wed Aug 15 20:38:29 2018

Rename transformationMatrixToFloat32Array

Rename transformationMatrixToFloat32Array
to transformationMatrixToDOMFloat32Array
to more accurately reflect the type it
returns.

Bug:  845296 
Change-Id: Iedea31c7b8335795657bf582215ed566861b4127
Reviewed-on: https://chromium-review.googlesource.com/1171830
Reviewed-by: Bill Orr <billorr@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Commit-Queue: Max Rebuschatis <lincolnfrog@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583377}
[modify] https://crrev.com/d77c4d66e0be7835b93fea326e283a1789cb033a/third_party/blink/renderer/modules/xr/xr_device_pose.cc
[modify] https://crrev.com/d77c4d66e0be7835b93fea326e283a1789cb033a/third_party/blink/renderer/modules/xr/xr_hit_result.cc
[modify] https://crrev.com/d77c4d66e0be7835b93fea326e283a1789cb033a/third_party/blink/renderer/modules/xr/xr_input_pose.cc
[modify] https://crrev.com/d77c4d66e0be7835b93fea326e283a1789cb033a/third_party/blink/renderer/modules/xr/xr_ray.cc
[modify] https://crrev.com/d77c4d66e0be7835b93fea326e283a1789cb033a/third_party/blink/renderer/modules/xr/xr_utils.cc
[modify] https://crrev.com/d77c4d66e0be7835b93fea326e283a1789cb033a/third_party/blink/renderer/modules/xr/xr_utils.h