Update API to latest spec : Remove VRFrameData#timestamp

chrome/browser/android/vr_shell/vr_shell.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/android/vr_shell/vr_shell.h"
 
 #include <android/native_window_jni.h>
 
 #include <string>
 #include <utility>
@@ skipping 575 matching lines @@
   if (content_input_manager_) {
     content_input_manager_->ProcessUpdatedGesture(std::move(event));
   } else if (android_ui_gesture_target_) {
     android_ui_gesture_target_->DispatchWebInputEvent(std::move(event));
   }
 }
 
 device::mojom::VRPosePtr VrShell::VRPosePtrFromGvrPose(gvr::Mat4f head_mat) {
   device::mojom::VRPosePtr pose = device::mojom::VRPose::New();
 
-  pose->timestamp = base::Time::Now().ToJsTime();
   pose->orientation.emplace(4);
 
   gfx::Transform inv_transform(
       head_mat.m[0][0], head_mat.m[0][1], head_mat.m[0][2], head_mat.m[0][3],
       head_mat.m[1][0], head_mat.m[1][1], head_mat.m[1][2], head_mat.m[1][3],
       head_mat.m[2][0], head_mat.m[2][1], head_mat.m[2][2], head_mat.m[2][3],
       head_mat.m[3][0], head_mat.m[3][1], head_mat.m[3][2], head_mat.m[3][3]);
 
   gfx::Transform transform;
   if (inv_transform.GetInverse(&transform)) {
@@ skipping 80 matching lines @@
            jboolean reprojected_rendering) {
   return reinterpret_cast<intptr_t>(new VrShell(
       env, obj, reinterpret_cast<ui::WindowAndroid*>(content_window_android),
       content::WebContents::FromJavaWebContents(ui_web_contents),
       reinterpret_cast<ui::WindowAndroid*>(ui_window_android), for_web_vr,
       VrShellDelegate::GetNativeVrShellDelegate(env, delegate),
       reinterpret_cast<gvr_context*>(gvr_api), reprojected_rendering));
 }
 
 }  // namespace vr_shell