[Password Generation] Update UI to match final mocks.

components/autofill/content/renderer/form_autofill_util.cc

Index: components/autofill/content/renderer/form_autofill_util.cc
diff --git a/components/autofill/content/renderer/form_autofill_util.cc b/components/autofill/content/renderer/form_autofill_util.cc
index 74d5b689e6c331114072f986ec49251dd89eecec..5d1f3799331a39aa09ec0e15b88b0af56f034b92 100644
--- a/components/autofill/content/renderer/form_autofill_util.cc
+++ b/components/autofill/content/renderer/form_autofill_util.cc
@@ -1175,4 +1175,12 @@ bool IsWebElementEmpty(const blink::WebElement& element) {
   return true;
 }
 
+gfx::RectF GetScaledBoundingBox(float scale, WebInputElement* element) {
+  gfx::Rect bounding_box(element->boundsInViewportSpace());
+  return gfx::RectF(bounding_box.x() * scale,
+                    bounding_box.y() * scale,
+                    bounding_box.width() * scale,
+                    bounding_box.height() * scale);
+}
+
 }  // namespace autofill