Fix keyboard focus for OOPIF-<webview>.

content/browser/frame_host/render_frame_host_impl.h

Index: content/browser/frame_host/render_frame_host_impl.h
diff --git a/content/browser/frame_host/render_frame_host_impl.h b/content/browser/frame_host/render_frame_host_impl.h
index fda2cf18b882eb4d26944e846320c49da4d61f82..92d2fef6b6015ac0cbc53ad97a90d239ec4e222a 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -415,6 +415,11 @@ class CONTENT_EXPORT RenderFrameHostImpl : public RenderFrameHost,
   // cross-process window.focus() calls.
   void SetFocusedFrame();
 
+  // Unset this frame as focused in the renderer process.  This allows loss of
+  // focus inside an inner WebContents when focus in the embedder goes from that
+  // WebContents to another element in the embedder WebContents.

[alexmos, 2016/05/12 20:28:40]

This sounded a bit ambiguous to me, do you mean "This is used to clear focus
inside an inner WebContents when focus shifts to a frame in the outer
WebContents"?

[avallee, 2016/05/16 20:26:43]

Pretty good.

Focus could also move to a sibling webcontents.

[alexmos, 2016/05/19 00:08:08]

Acknowledged.

+  void UnsetFocusedFrame();
+
   // Deletes the current selection plus the specified number of characters
   // before and after the selection or caret.
   void ExtendSelectionAndDelete(size_t before, size_t after);