Animated scroll shouldn't consume unhandled scrolls for OOPIFs.

content/renderer/render_widget.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/renderer/render_widget.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 1262 matching lines @@
   if (compositor_)
     compositor_->SetViewportSize(physical_backing_size_);
 }
 
 blink::WebLayerTreeView* RenderWidget::InitializeLayerTreeView() {
   DCHECK(!host_closing_);
 
   compositor_ = RenderWidgetCompositor::Create(this, compositor_deps_);
   auto animation_host = cc::AnimationHost::CreateMainInstance();
 
+  // Oopif status must be set before the LayerTreeHost is created.
+  compositor_->SetIsForOopif(for_oopif_);
   auto layer_tree_host = RenderWidgetCompositor::CreateLayerTreeHost(
       compositor_.get(), compositor_.get(), animation_host.get(),
       compositor_deps_, device_scale_factor_, screen_info_);
   compositor_->Initialize(std::move(layer_tree_host),
                           std::move(animation_host));
 
-  compositor_->SetIsForOopif(for_oopif_);
   compositor_->SetViewportSize(physical_backing_size_);
   OnDeviceScaleFactorChanged();
   compositor_->SetRasterColorSpace(screen_info_.icc_profile.GetColorSpace());
   compositor_->SetContentSourceId(current_content_source_id_);
 #if defined(USE_AURA)
   RendererWindowTreeClient* window_tree_client =
       RendererWindowTreeClient::Get(routing_id_);
   if (window_tree_client)
     compositor_->SetLocalSurfaceId(window_tree_client->local_surface_id());
 #endif
@@ skipping 1014 matching lines @@
     // browser side (https://crbug.com/669219).
     // If there is no WebFrameWidget, then there will be no
     // InputMethodControllers for a WebLocalFrame.
     return nullptr;
   }
   return static_cast<blink::WebFrameWidget*>(GetWebWidget())
       ->GetActiveWebInputMethodController();
 }
 
 }  // namespace content