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

device/vr/BUILD.gn

 # 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.
 
 import("//build/config/features.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")  # For generate_jni().
 }
@@ skipping 24 matching lines @@
       "vr_device_provider.h",
       "vr_display_impl.cc",
       "vr_display_impl.h",
       "vr_export.h",
       "vr_service_impl.cc",
       "vr_service_impl.h",
     ]
 
     deps += [
       "//base",
+      "//gpu/ipc/common:interfaces",
       "//mojo/public/cpp/bindings",
       "//ui/gfx",
     ]
 
     if (is_android && (current_cpu == "arm" || current_cpu == "arm64")) {
       sources += [
         "android/gvr/gvr_delegate.cc",
         "android/gvr/gvr_delegate.h",
         "android/gvr/gvr_device.cc",
         "android/gvr/gvr_device.h",
@@ skipping 37 matching lines @@
     ]
   }
 }
 
 mojom("mojo_bindings") {
   sources = [
     "vr_service.mojom",
   ]
 
   public_deps = [
+    "//gpu/ipc/common:interfaces",
     "//mojo/common:common_custom_types",
   ]
 
   export_class_attribute = "DEVICE_VR_EXPORT"
   export_define = "DEVICE_VR_IMPLEMENTATION=1"
   export_header = "device/vr/vr_export.h"
 }