The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d862b31c76a0c0f674df51105eedd2cde0776e29

commit d862b31c76a0c0f674df51105eedd2cde0776e29
Author: Yash Malik <ymalik@google.com>
Date: Sat Dec 02 02:09:32 2017

VR: Introduce keyboard as element

This CL introduces the notion of input focus and adds plumbing
between the GVR Keyboard and our UI. It adds functionality for
showing the keyboard on input text focus, and updating the said
input text model when the user types on the keyboard.

Bug: 780135, 780318 
Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I91c02e2de8b96703307c6f37436ef107d5b5dd07
Reviewed-on: https://chromium-review.googlesource.com/786302
Commit-Queue: Yash Malik <ymalik@chromium.org>
Reviewed-by: Christopher Grant <cjgrant@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521179}
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/android/vr_shell/BUILD.gn
[add] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/android/vr_shell/gvr_keyboard_delegate.cc
[add] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/android/vr_shell/gvr_keyboard_delegate.h
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/android/vr_shell/gvr_util.cc
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/android/vr_shell/gvr_util.h
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/android/vr_shell/vr_gl_thread.cc
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/android/vr_shell/vr_gl_thread.h
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/android/vr_shell/vr_shell_gl.cc
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/android/vr_shell/vr_shell_gl.h
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/BUILD.gn
[add] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/elements/keyboard.cc
[add] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/elements/keyboard.h
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/elements/text_input.cc
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/elements/text_input.h
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/elements/ui_element.cc
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/elements/ui_element.h
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/elements/ui_element_name.cc
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/elements/ui_element_name.h
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/elements/ui_texture.cc
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/elements/ui_texture.h
[add] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/keyboard_delegate.h
[add] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/keyboard_ui_interface.h
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/model/model.h
[add] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/model/text_input_info.cc
[add] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/model/text_input_info.h
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/test/ui_pixel_test.cc
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/test/ui_test.cc
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/testapp/vr_test_context.cc
[add] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/text_input_delegate.cc
[add] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/text_input_delegate.h
[add] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/text_input_unittest.cc
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/ui.cc
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/ui.h
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/ui_input_manager.cc
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/ui_input_manager.h
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/ui_input_manager_unittest.cc
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/ui_renderer.cc
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/ui_renderer.h
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/ui_scene.cc
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/ui_scene.h
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/ui_scene_constants.h
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/ui_scene_creator.cc
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/ui_scene_creator.h
[modify] https://crrev.com/d862b31c76a0c0f674df51105eedd2cde0776e29/chrome/browser/vr/ui_unittest.cc

This is fixed with the CL above and https://chromium-review.googlesource.com/c/chromium/src/+/786112