Introduce ViewRoot to forward input/view events to native

android_webview/native/aw_contents.cc

 // Copyright 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 "android_webview/native/aw_contents.h"
 
 #include <limits>
 #include <utility>
 
 #include "android_webview/browser/aw_browser_context.h"
@@ skipping 1237 matching lines @@
   content::ChildProcessSecurityPolicy::GetInstance()->GrantScheme(
       web_contents_->GetRenderProcessHost()->GetID(), url::kFileScheme);
 }
 
 void AwContents::ResumeLoadingCreatedPopupWebContents(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj) {
   web_contents_->ResumeLoadingCreatedWebContents();
 }
 
+ScopedJavaLocalRef<jobject> AwContents::GetViewRoot(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj) {
+  return web_contents_->GetNativeView()->GetViewRoot();
+}
+
 void SetShouldDownloadFavicons(JNIEnv* env,
                                const JavaParamRef<jclass>& jclazz) {
   g_should_download_favicons = true;
 }
 
 void AwContents::RenderViewHostChanged(content::RenderViewHost* old_host,
                                        content::RenderViewHost* new_host) {
   DCHECK(new_host);
 
   int process_id = new_host->GetProcess()->GetID();
   int routing_id = new_host->GetRoutingID();
   // At this point, the current RVH may or may not contain a compositor. So
   // compositor_ may be nullptr, in which case
   // BrowserViewRenderer::DidInitializeCompositor() callback is time when the
   // new compositor is constructed.
   browser_view_renderer_.SetActiveCompositorID(
       CompositorID(process_id, routing_id));
 }
 
 }  // namespace android_webview