Introduce ViewRoot forwarding input/view events to native

ui/snapshot/snapshot_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 "ui/snapshot/snapshot.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 26 matching lines @@
 }
 
 static void MakeAsyncCopyRequest(
     gfx::NativeWindow window,
     const gfx::Rect& source_rect,
     const cc::CopyOutputRequest::CopyOutputRequestCallback& callback) {
   std::unique_ptr<cc::CopyOutputRequest> request =
       cc::CopyOutputRequest::CreateBitmapRequest(callback);
 
   const display::Display& display =
-      display::Screen::GetScreen()->GetDisplayNearestWindow(window);
+      display::Screen::GetScreen()->GetDisplayNearestWindowAndroid(window);
   float scale = display.device_scale_factor();
   request->set_area(gfx::ScaleToEnclosingRect(source_rect, scale));
   window->GetCompositor()->RequestCopyOfOutputOnRootLayer(std::move(request));
 }
 
 void GrabWindowSnapshotAndScaleAsync(
     gfx::NativeWindow window,
     const gfx::Rect& source_rect,
     const gfx::Size& target_size,
     scoped_refptr<base::TaskRunner> background_task_runner,
@@ skipping 24 matching lines @@
     scoped_refptr<base::TaskRunner> background_task_runner,
     const GrabWindowSnapshotAsyncPNGCallback& callback) {
   MakeAsyncCopyRequest(view->GetWindowAndroid(),
                        source_rect,
                        base::Bind(&SnapshotAsync::EncodeCopyOutputResult,
                                   callback,
                                   background_task_runner));
 }
 
 }  // namespace ui