[Element / Autofill] Add boundsInViewportFloat() to fix <input> popup misalignment.

components/autofill/content/renderer/password_generation_agent.cc

Index: components/autofill/content/renderer/password_generation_agent.cc
diff --git a/components/autofill/content/renderer/password_generation_agent.cc b/components/autofill/content/renderer/password_generation_agent.cc
index 6ad50b527be8be544cd6d4b5df2c72cf4636d739..62ba413c091a7d3edb9c3b10ca19ef2b730e368d 100644
--- a/components/autofill/content/renderer/password_generation_agent.cc
+++ b/components/autofill/content/renderer/password_generation_agent.cc
@@ -18,6 +18,7 @@
 #include "content/public/renderer/render_frame.h"
 #include "content/public/renderer/render_view.h"
 #include "google_apis/gaia/gaia_urls.h"
+#include "third_party/WebKit/public/platform/WebFloatRect.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebFormElement.h"
@@ -411,23 +412,19 @@ bool PasswordGenerationAgent::TextDidChangeInTextField(
 }
 
 void PasswordGenerationAgent::ShowGenerationPopup() {
-  blink::WebRect bounding_box_in_window =
-      generation_element_.boundsInViewport();
-  render_frame()->GetRenderView()->convertViewportToWindow(
-      &bounding_box_in_window);
-
+  blink::WebFloatRect bounding_box_in_window;
+  render_frame()->GetRenderView()->getElementBoundingBoxWindow(
+      &generation_element_, &bounding_box_in_window);
   Send(new AutofillHostMsg_ShowPasswordGenerationPopup(
       routing_id(), gfx::RectF(bounding_box_in_window),
       generation_element_.maxLength(), *generation_form_data_->form));
-
   generation_popup_shown_ = true;
 }
 
 void PasswordGenerationAgent::ShowEditingPopup() {
-  blink::WebRect bounding_box_in_window =
-      generation_element_.boundsInViewport();
-  render_frame()->GetRenderView()->convertViewportToWindow(
-      &bounding_box_in_window);
+  blink::WebFloatRect bounding_box_in_window;
+  render_frame()->GetRenderView()->getElementBoundingBoxWindow(
+      &generation_element_, &bounding_box_in_window);
   Send(new AutofillHostMsg_ShowPasswordEditingPopup(
       routing_id(), gfx::RectF(bounding_box_in_window),
       *generation_form_data_->form));