Implement our own GLThread for VR Shell.

content/browser/renderer_host/compositor_impl_android.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/compositor_impl_android.h"
 
 #include <android/bitmap.h>
 #include <android/native_window_jni.h>
 #include <stdint.h>
 #include <unordered_set>
@@ skipping 436 matching lines @@
     subroot_layer_ = NULL;
   }
   if (root_window_->GetLayer()) {
     subroot_layer_ = root_window_->GetLayer();
     root_window_->GetLayer()->AddChild(root_layer);
   }
 }
 
 void CompositorImpl::SetSurface(jobject surface) {
   JNIEnv* env = base::android::AttachCurrentThread();
-  base::android::ScopedJavaLocalRef<jobject> j_surface(env, surface);
-
   gpu::GpuSurfaceTracker* tracker = gpu::GpuSurfaceTracker::Get();
 
   if (window_) {
     // Shut down GL context before unregistering surface.
     SetVisible(false);
     tracker->RemoveSurface(surface_handle_);
     ANativeWindow_release(window_);
     window_ = NULL;
 
     tracker->UnregisterViewSurface(surface_handle_);
     surface_handle_ = gpu::kNullSurfaceHandle;
   }
 
   ANativeWindow* window = NULL;
   if (surface) {
     // Note: This ensures that any local references used by
     // ANativeWindow_fromSurface are released immediately. This is needed as a
     // workaround for https://code.google.com/p/android/issues/detail?id=68174
     base::android::ScopedJavaLocalFrame scoped_local_reference_frame(env);
     window = ANativeWindow_fromSurface(env, surface);
   }
 
   if (window) {
     window_ = window;
     ANativeWindow_acquire(window);
     surface_handle_ = tracker->AddSurfaceForNativeWidget(window);
     // Register first, SetVisible() might create a CompositorFrameSink.
-    tracker->RegisterViewSurface(surface_handle_, j_surface);
+    tracker->RegisterViewSurface(surface_handle_, surface);
     SetVisible(true);
     ANativeWindow_release(window);
   }
 }
 
 void CompositorImpl::CreateLayerTreeHost() {
   DCHECK(!host_);
 
   cc::LayerTreeSettings settings;
   settings.renderer_settings.refresh_rate = 60.0;
@@ skipping 341 matching lines @@
 
 cc::FrameSinkId CompositorImpl::GetFrameSinkId() {
   return frame_sink_id_;
 }
 
 bool CompositorImpl::HavePendingReadbacks() {
   return !readback_layer_tree_->children().empty();
 }
 
 }  // namespace content