Allow MimeHandlerViewGuest be embedded inside OOPIFs

content/browser/renderer_host/render_widget_host_view_base.h

Index: content/browser/renderer_host/render_widget_host_view_base.h
diff --git a/content/browser/renderer_host/render_widget_host_view_base.h b/content/browser/renderer_host/render_widget_host_view_base.h
index b556e1cdec81a2b1e161f32525d3743b2aa1351a..785ba137b8256c5406a00a86a601656431212601 100644
--- a/content/browser/renderer_host/render_widget_host_view_base.h
+++ b/content/browser/renderer_host/render_widget_host_view_base.h
@@ -287,6 +287,13 @@ class CONTENT_EXPORT RenderWidgetHostViewBase : public RenderWidgetHostView,
   // need to also be resolved.
   virtual bool IsRenderWidgetHostViewChildFrame();
 
+  // TODO(ekaramad): This is used for input event routing when the target of
+  // events is a RenderWidgetHostViewGuest which is embeded in an OOPIF (the
+  // only example right now is MimeHandlerViewGuest). Same as above, this
+  // method should be removed when either direct routing is supported for
+  // RWHVG or RWHVG is removed entirely.
+  virtual RenderWidgetHostViewBase* GetEmbedderView();

[Charlie Reis, 2016/10/18 22:52:20]

Should we be using a different term here, like "outer" instead of "embedder"? 
Within content/, embedder tends to refer to the content/ embedder.

[EhsanK, 2016/10/20 21:41:17]

I think outer is better in that case. But technically the name should be:
GetTargetViewForMouseEvents() or something like that (given that that is the
only application of the method).

+
   //----------------------------------------------------------------------------
   // The following methods are related to IME.
   // TODO(ekaramad): Most of the IME methods should not stay virtual after IME