Remove grow box rect support, browser part.

services/navigation/view_impl.h

Index: services/navigation/view_impl.h
diff --git a/services/navigation/view_impl.h b/services/navigation/view_impl.h
index 8d9c5d2316b570670b7c481cda12ec6edf2baa81..cad292b65f4f0a93da0469e341efcffae968ec9a 100644
--- a/services/navigation/view_impl.h
+++ b/services/navigation/view_impl.h
@@ -50,7 +50,6 @@ class ViewImpl : public mojom::View,
   void GetWindowTreeClient(ui::mojom::WindowTreeClientRequest request) override;
   void ShowInterstitial(const mojo::String& html) override;
   void HideInterstitial() override;
-  void SetResizerSize(const gfx::Size& size) override;
 
   // content::WebContentsDelegate:
   void AddNewContents(content::WebContents* source,
@@ -70,7 +69,6 @@ class ViewImpl : public mojom::View,
   void LoadProgressChanged(content::WebContents* source,
                            double progress) override;
   void UpdateTargetURL(content::WebContents* source, const GURL& url) override;
-  gfx::Rect GetRootWindowResizerRect() const override;
 
   // content::NotificationObserver:
   void Observe(int type,
@@ -103,8 +101,6 @@ class ViewImpl : public mojom::View,
 
   std::unique_ptr<views::Widget> widget_;
 
-  gfx::Size resizer_size_;
-
   DISALLOW_COPY_AND_ASSIGN(ViewImpl);
 };