Animated scroll shouldn't consume unhandled scrolls for OOPIFs.

content/browser/renderer_host/compositor_impl_android.cc

Index: content/browser/renderer_host/compositor_impl_android.cc
diff --git a/content/browser/renderer_host/compositor_impl_android.cc b/content/browser/renderer_host/compositor_impl_android.cc
index bfc265f4d4af18e2450629f11828e91d382043fa..60f85b17963e7906b677fd09ca10e20d386b6511 100644
--- a/content/browser/renderer_host/compositor_impl_android.cc
+++ b/content/browser/renderer_host/compositor_impl_android.cc
@@ -444,6 +444,10 @@ CompositorImpl::~CompositorImpl() {
   GetSurfaceManager()->InvalidateFrameSinkId(frame_sink_id_);
 }
 
+bool CompositorImpl::IsForSubframe() {
+  return false;
+}
+
 ui::UIResourceProvider& CompositorImpl::GetUIResourceProvider() {
   return *this;
 }