[merge m57][autofill] Verify widget view is valid before using it.

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 2449d6c69d0911e6e357dbeaad10f209b1347bc9..8eb8de071aecbdb8444f5b52908e1f4cdf69cacb 100644
--- a/components/autofill/content/browser/content_autofill_driver.cc
+++ b/components/autofill/content/browser/content_autofill_driver.cc
@@ -159,15 +159,15 @@ void ContentAutofillDriver::PopupHidden() {
 
 gfx::RectF ContentAutofillDriver::TransformBoundingBoxToViewportCoordinates(
     const gfx::RectF& bounding_box) {
+  content::RenderWidgetHostView* view = render_frame_host_->GetView();
+  if (!view)
+    return 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;
+  gfx::Point transformed_point =
+      view->TransformPointToRootCoordSpace(orig_point);
+  return gfx::RectF(transformed_point.x(), transformed_point.y(),
+                    bounding_box.width(), bounding_box.height());
 }
 
 void ContentAutofillDriver::DidInteractWithCreditCardForm() {