Enable WebViewAccessiblityTest for OOPIF webview.

content/browser/web_contents/web_contents_impl.h

Index: content/browser/web_contents/web_contents_impl.h
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index e6fe43f9736f9c9de064b0da1a81e968666c1a31..8f7661f8e1673f6798a458ac95f7eb80520ca0a8 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -536,6 +536,7 @@ class CONTENT_EXPORT WebContentsImpl
   std::unique_ptr<WebUIImpl> CreateWebUIForRenderFrameHost(
       const GURL& url) override;
   void SetFocusedFrame(FrameTreeNode* node, SiteInstance* source) override;
+  RenderFrameHost* GetFocusedFrameIncludingInnerWebContents() override;
   void OnFocusedElementChangedInFrame(
       RenderFrameHostImpl* frame,
       const gfx::Rect& bounds_in_root_view) override;
@@ -1165,6 +1166,10 @@ class CONTENT_EXPORT WebContentsImpl
   // Returns the root of the WebContents tree.
   WebContentsImpl* GetOutermostWebContents();
 
+  // Walks up the outer WebContents chain and focuses the FrameTreeNode where
+  // each inner WebContents is attached.
+  void FocusOuterAttachmentFrameChain();
+
   // Navigation helpers --------------------------------------------------------
   //
   // These functions are helpers for Navigate() and DidNavigate().