VR: Stop creating keyboard for DLAs

We don't use the keyboard with we're launching Chrome VR for a DLA. Creating it
unnecessarily means a startup slow-down of about 500ms - 1s.

Bug: 804532
Change-Id: Idc351a7233a07047318845999c4ab5cc13c90dc6
Reviewed-on: https://chromium-review.googlesource.com/879092
Reviewed-by: Michael Thiessen <mthiesse@chromium.org>
Commit-Queue: Yash Malik <ymalik@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#531101}(cherry picked from commit 371fc8f)
Reviewed-on: https://chromium-review.googlesource.com/884101
Reviewed-by: Yash Malik <ymalik@chromium.org>
Cr-Commit-Position: refs/branch-heads/3325@{#61}
Cr-Branched-From: bc084a8-refs/heads/master@{#530369}

chrome/browser/android/vr_shell/vr_gl_thread.cc

@@ -46,7 +46,8 @@ base::WeakPtr<VrShellGl> VrGLThread::GetVrShellGl() {
 
 void VrGLThread::Init() {
   bool keyboard_enabled =
-      base::FeatureList::IsEnabled(features::kVrBrowserKeyboard);
+      base::FeatureList::IsEnabled(features::kVrBrowserKeyboard) &&
+      !ui_initial_state_.web_vr_autopresentation_expected;
   if (keyboard_enabled) {
     keyboard_delegate_ = GvrKeyboardDelegate::Create();
     text_input_delegate_ = std::make_unique<vr::TextInputDelegate>();