add more information to voice interaction root node.

chrome/browser/chromeos/arc/voice_interaction/arc_voice_interaction_arc_home_service.cc

Index: chrome/browser/chromeos/arc/voice_interaction/arc_voice_interaction_arc_home_service.cc
diff --git a/chrome/browser/chromeos/arc/voice_interaction/arc_voice_interaction_arc_home_service.cc b/chrome/browser/chromeos/arc/voice_interaction/arc_voice_interaction_arc_home_service.cc
index e62920061ce26e17c8b3d7a5798b1c19eea2ff60..0ab5ad13c7d037455937572375c7ded8f2465cf7 100644
--- a/chrome/browser/chromeos/arc/voice_interaction/arc_voice_interaction_arc_home_service.cc
+++ b/chrome/browser/chromeos/arc/voice_interaction/arc_voice_interaction_arc_home_service.cc
@@ -28,6 +28,7 @@
 #include "ui/aura/window.h"
 #include "ui/snapshot/snapshot.h"
 #include "ui/wm/public/activation_client.h"
+#include "url/gurl.h"
 
 namespace arc {
 
@@ -64,10 +65,17 @@ mojom::VoiceInteractionStructurePtr CreateVoiceInteractionStructure(
 
 void RequestVoiceInteractionStructureCallback(
     const base::Callback<void(mojom::VoiceInteractionStructurePtr)>& callback,
+    const gfx::Rect& bounds,
+    const std::string& web_url,
     const ui::AXTreeUpdate& update) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
-  callback.Run(CreateVoiceInteractionStructure(
+  auto root = mojom::VoiceInteractionStructure::New();
+  root->rect = bounds;
+  root->class_name = "android.view.dummy.root.WebUrl";
+  root->text = base::UTF8ToUTF16(web_url);
+  root->children.push_back(CreateVoiceInteractionStructure(
       *ui::AXSnapshotNodeAndroid::Create(update, false)));
+  callback.Run(std::move(root));
 }
 
 }  // namespace
@@ -121,7 +129,9 @@ void ArcVoiceInteractionArcHomeService::GetVoiceInteractionStructure(
   }
 
   web_contents->RequestAXTreeSnapshot(
-      base::Bind(&RequestVoiceInteractionStructureCallback, callback));
+      base::Bind(&RequestVoiceInteractionStructureCallback, callback,
+                 browser->window()->GetBounds(),
+                 web_contents->GetLastCommittedURL().spec()));
 }
 
 void ArcVoiceInteractionArcHomeService::OnVoiceInteractionOobeSetupComplete() {