Fix the position of context menu for BrowserPlugins inside OOPIF (Merge to M-57)

content/browser/web_contents/web_contents_view_guest.cc

Index: content/browser/web_contents/web_contents_view_guest.cc
diff --git a/content/browser/web_contents/web_contents_view_guest.cc b/content/browser/web_contents/web_contents_view_guest.cc
index b2b86fa755e42097b0fedadd693a32b281cd57be..a93bc375bbbdc45d817dd74f21b5396cff509509 100644
--- a/content/browser/web_contents/web_contents_view_guest.cc
+++ b/content/browser/web_contents/web_contents_view_guest.cc
@@ -92,7 +92,8 @@ void WebContentsViewGuest::GetContainerBounds(gfx::Rect* out) const {
   if (guest_->embedder_web_contents()) {
     // We need embedder container's bounds to calculate our bounds.
     guest_->embedder_web_contents()->GetView()->GetContainerBounds(out);
-    gfx::Point guest_coordinates = guest_->GetScreenCoordinates(gfx::Point());
+    gfx::Point guest_coordinates =
+        guest_->GetCoordinatesInEmbedderWebContents(gfx::Point());
     out->Offset(guest_coordinates.x(), guest_coordinates.y());
   } else {
     out->set_origin(gfx::Point());