aw: Fix FBO restore bug

android_webview/browser/surfaces_instance.cc

Index: android_webview/browser/surfaces_instance.cc
diff --git a/android_webview/browser/surfaces_instance.cc b/android_webview/browser/surfaces_instance.cc
index b418075f9d02427ef326b33254fe3d53e4f86405..f089b1642a49d926510b30fe20d2f7a60d6f9332 100644
--- a/android_webview/browser/surfaces_instance.cc
+++ b/android_webview/browser/surfaces_instance.cc
@@ -32,15 +32,19 @@ SurfacesInstance* g_surfaces_instance = nullptr;
 }  // namespace
 
 // static
-scoped_refptr<SurfacesInstance> SurfacesInstance::GetOrCreateInstance() {
-  if (g_surfaces_instance)
+scoped_refptr<SurfacesInstance> SurfacesInstance::GetOrCreateInstance(
+    int framebuffer_binding_ext) {
+  if (g_surfaces_instance) {
+    g_surfaces_instance->SetBackingFrameBufferObject(framebuffer_binding_ext);
     return make_scoped_refptr(g_surfaces_instance);
-  return make_scoped_refptr(new SurfacesInstance);
+  }
+  return make_scoped_refptr(new SurfacesInstance(framebuffer_binding_ext));
 }
 
-SurfacesInstance::SurfacesInstance()
+SurfacesInstance::SurfacesInstance(int framebuffer_binding_ext)
   : next_surface_id_namespace_(1u),
     gl_surface_(new AwGLSurface) {
+  gl_surface_->SetBackingFrameBufferObject(framebuffer_binding_ext);
   cc::RendererSettings settings;
 
   // Should be kept in sync with compositor_impl_android.cc.