Fix the position of context menu for BrowserPlugins inside OOPIF

content/browser/browser_plugin/browser_plugin_guest.cc

Index: content/browser/browser_plugin/browser_plugin_guest.cc
diff --git a/content/browser/browser_plugin/browser_plugin_guest.cc b/content/browser/browser_plugin/browser_plugin_guest.cc
index d4d4f14d881c1e6f02b7efe8578dc5bbd3785819..c8af73bf03c9f3a3087b7c325ab94b4f62d55042 100644
--- a/content/browser/browser_plugin/browser_plugin_guest.cc
+++ b/content/browser/browser_plugin/browser_plugin_guest.cc
@@ -363,6 +363,11 @@ void BrowserPluginGuest::InitInternal(
       GetWebContents()->GetRenderViewHost()->GetWebkitPreferences();
   prefs.navigate_on_drag_drop = false;
   GetWebContents()->GetRenderViewHost()->UpdateWebkitPreferences(prefs);
+
+  if (auto* owner_rwhv = GetOwnerRenderWidgetHostView()) {
+    guest_window_rect_.set_origin(owner_rwhv->TransformPointToRootCoordSpace(
+        guest_window_rect_.origin()));
+  }
 }
 
 BrowserPluginGuest::~BrowserPluginGuest() {
@@ -1002,6 +1007,11 @@ void BrowserPluginGuest::OnUpdateGeometry(int browser_plugin_instance_id,
   // The plugin has moved within the embedder without resizing or the
   // embedder/container's view rect changing.
   guest_window_rect_ = view_rect;
+  if (auto* rwhv = GetOwnerRenderWidgetHostView()) {
+    guest_window_rect_.set_origin(
+        rwhv->TransformPointToRootCoordSpace(guest_window_rect_.origin()));
+  }
+
   GetWebContents()->SendScreenRects();
 }