Remove WebContents methods that duplicate WebContentsView methods.

chrome/browser/ui/gtk/notifications/balloon_view_host_gtk.cc

Index: chrome/browser/ui/gtk/notifications/balloon_view_host_gtk.cc
diff --git a/chrome/browser/ui/gtk/notifications/balloon_view_host_gtk.cc b/chrome/browser/ui/gtk/notifications/balloon_view_host_gtk.cc
index 7f3184454a5fa8800f8540fdef5ce148b2df2430..dba6a1b487e3e4738a2d92a5e27ec1338c0d2740 100644
--- a/chrome/browser/ui/gtk/notifications/balloon_view_host_gtk.cc
+++ b/chrome/browser/ui/gtk/notifications/balloon_view_host_gtk.cc
@@ -10,6 +10,7 @@
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_contents_view.h"
 
 BalloonViewHost::BalloonViewHost(Balloon* balloon)
     : BalloonHost(balloon) {
@@ -32,5 +33,5 @@ void BalloonViewHost::UpdateActualSize(const gfx::Size& new_size) {
 }
 
 gfx::NativeView BalloonViewHost::native_view() const {
-  return web_contents_->GetNativeView();
+  return web_contents_->GetView()->GetNativeView();
 }