Re-land^2 WebVR compositor bypass via BrowserMain context + mailbox

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"
 #include "base/trace_event/trace_event.h"
 #include "device/vr/android/gvr/gvr_delegate.h"
 #include "device/vr/android/gvr/gvr_device_provider.h"
 #include "device/vr/vr_device_manager.h"
+#include "gpu/command_buffer/common/mailbox.h"
 #include "third_party/gvr-android-sdk/src/libraries/headers/vr/gvr/capi/include/gvr.h"
 #include "third_party/gvr-android-sdk/src/libraries/headers/vr/gvr/capi/include/gvr_types.h"
 #include "ui/gfx/transform.h"
 #include "ui/gfx/transform_util.h"
 
 namespace device {
 
 GvrDevice::GvrDevice(GvrDeviceProvider* provider)
     : VRDevice(), gvr_provider_(provider) {}
 
@@ skipping 24 matching lines @@
   GvrDelegate* delegate = GetGvrDelegate();
   if (delegate)
     delegate->SetWebVRSecureOrigin(secure_origin_);
 }
 
 void GvrDevice::ExitPresent() {
   gvr_provider_->ExitPresent();
   OnExitPresent();
 }
 
-void GvrDevice::SubmitFrame(mojom::VRPosePtr pose) {
+void GvrDevice::SubmitFrame(
+    mojom::VRPosePtr pose,
+    mojom::VRSubmitFrameClientPtr submit_client) {
   GvrDelegate* delegate = GetGvrDelegate();
-  if (delegate)
-    delegate->SubmitWebVRFrame();
+  if (delegate) {
+    gpu::Mailbox mailbox;
+    mailbox.SetName(&pose->mailbox->name[0]);
+    delegate->SubmitWebVRFrame(
+        pose->frameId, mailbox, std::move(submit_client));
+  }
 }
 
 void GvrDevice::UpdateLayerBounds(int16_t frame_index,
                                   mojom::VRLayerBoundsPtr left_bounds,
                                   mojom::VRLayerBoundsPtr right_bounds) {
   GvrDelegate* delegate = GetGvrDelegate();
   if (!delegate)
     return;
 
   gvr::Rectf left_gvr_bounds;
@@ skipping 30 matching lines @@
 }
 
 GvrDelegate* GvrDevice::GetGvrDelegate() {
   GvrDelegateProvider* delegate_provider = GvrDelegateProvider::GetInstance();
   if (delegate_provider)
     return delegate_provider->GetDelegate();
   return nullptr;
 }
 
 }  // namespace device