Remove WebContents::Was{Hidden,Shown}() from the content public interface

android_webview/native/aw_web_contents_delegate.cc

Index: android_webview/native/aw_web_contents_delegate.cc
diff --git a/android_webview/native/aw_web_contents_delegate.cc b/android_webview/native/aw_web_contents_delegate.cc
index 7fbec6f1079f813b981e61671c6b3bc0dd208dbb..cae824a75ade49107cf10cc08976b573df29b94a 100644
--- a/android_webview/native/aw_web_contents_delegate.cc
+++ b/android_webview/native/aw_web_contents_delegate.cc
@@ -151,7 +151,7 @@ void AwWebContentsDelegate::AddNewContents(WebContents* source,
         make_scoped_ptr(new_contents));
     // Hide the WebContents for the pop up now, we will show it again
     // when the user calls us back with an AwContents to use to show it.
-    new_contents->WasHidden();
+    new_contents->MarkBackgrounded();
   } else {
     // The embedder has forgone their chance to display this popup
     // window, so we're done with the WebContents now. We use