Allow VRDisplay to specify which frame the layer bounds should be updated at.

device/vr/android/gvr/gvr_device.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 "device/vr/android/gvr/gvr_device.h"
 
 #include <math.h>
 #include <algorithm>
 
 #include "base/time/time.h"
@@ skipping 223 matching lines @@
 void GvrDevice::ExitPresent() {
   gvr_provider_->ExitPresent();
   OnExitPresent();
 }
 
 void GvrDevice::SubmitFrame(mojom::VRPosePtr pose) {
   if (delegate_)
     delegate_->SubmitWebVRFrame();
 }
 
-void GvrDevice::UpdateLayerBounds(mojom::VRLayerBoundsPtr left_bounds,
+void GvrDevice::UpdateLayerBounds(uint32_t frame_index,
+                                  mojom::VRLayerBoundsPtr left_bounds,
                                   mojom::VRLayerBoundsPtr right_bounds) {
   if (!delegate_)
     return;
 
   gvr::Rectf left_gvr_bounds;
   left_gvr_bounds.left = left_bounds->left;
   left_gvr_bounds.top = 1.0f - left_bounds->top;
   left_gvr_bounds.right = left_bounds->left + left_bounds->width;
   left_gvr_bounds.bottom = 1.0f - (left_bounds->top + left_bounds->height);
 
   gvr::Rectf right_gvr_bounds;
   right_gvr_bounds.left = right_bounds->left;
   right_gvr_bounds.top = 1.0f - right_bounds->top;
   right_gvr_bounds.right = right_bounds->left + right_bounds->width;
   right_gvr_bounds.bottom = 1.0f - (right_bounds->top + right_bounds->height);
 
-  delegate_->UpdateWebVRTextureBounds(left_gvr_bounds, right_gvr_bounds);
+  delegate_->UpdateWebVRTextureBounds(frame_index, left_gvr_bounds,
+                                      right_gvr_bounds);
 }
 
 void GvrDevice::SetDelegate(GvrDelegate* delegate) {
   delegate_ = delegate;
 
   // Notify the clients that this device has changed
   if (delegate_) {
     delegate_->SetWebVRSecureOrigin(secure_origin_);
     OnChanged();
   }
 }
 
 gvr::GvrApi* GvrDevice::GetGvrApi() {
   if (!delegate_)
     return nullptr;
 
   return delegate_->gvr_api();
 }
 
 }  // namespace device