Position autofill popup widgets correctly under --site-per-process

components/autofill/content/browser/content_autofill_driver.cc

Index: components/autofill/content/browser/content_autofill_driver.cc
diff --git a/components/autofill/content/browser/content_autofill_driver.cc b/components/autofill/content/browser/content_autofill_driver.cc
index 65ed75ac269acdc6460028827bce3978674c84da..23e11ebc46b87a66f9723d6fab6e19fd14ebae6d 100644
--- a/components/autofill/content/browser/content_autofill_driver.cc
+++ b/components/autofill/content/browser/content_autofill_driver.cc
@@ -20,8 +20,10 @@
 #include "content/public/browser/navigation_details.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_view_host.h"
+#include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/site_instance.h"
 #include "ipc/ipc_message_macros.h"
+#include "ui/gfx/geometry/size_f.h"
 
 namespace autofill {
 
@@ -147,6 +149,19 @@ void ContentAutofillDriver::PopupHidden() {
     RendererShouldClearPreviewedForm();
 }
 
+gfx::RectF ContentAutofillDriver::TransformBoundingBoxToViewportCoordinates(
+    const gfx::RectF& bounding_box) {
+  gfx::Point orig_point(bounding_box.x(), bounding_box.y());
+  gfx::Point transformed_point;
+  transformed_point =
+      render_frame_host_->GetView()->TransformPointToRootCoordSpace(orig_point);
+
+  gfx::RectF new_box;
+  new_box.SetRect(transformed_point.x(), transformed_point.y(),
+                  bounding_box.width(), bounding_box.height());
+  return new_box;
+}
+
 bool ContentAutofillDriver::HandleMessage(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ContentAutofillDriver, message)