Use the window coordinate for the autofill bounds.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 57b3ecfa1ed0a27a115f6c7614ce6a97fc9d21d7..e8d580b0f09260950427648508755252d7502f09 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -1941,7 +1941,9 @@ void RenderViewImpl::focusedNodeChanged(const WebNode& fromNode,
   bool is_editable = false;
   if (!toNode.isNull() && toNode.isElementNode()) {
     WebElement element = const_cast<WebNode&>(toNode).to<WebElement>();
-    node_bounds = gfx::Rect(element.boundsInViewport());
+    blink::WebRect rect = element.boundsInViewport();
+    convertViewportToWindow(&rect);
+    node_bounds = gfx::Rect(rect);
     is_editable = element.isEditable();
   }
   Send(new ViewHostMsg_FocusedNodeChanged(routing_id_, is_editable,
@@ -2136,6 +2138,20 @@ const std::string& RenderViewImpl::GetAcceptLanguages() const {
   return renderer_preferences_.accept_languages;
 }
 
+void RenderViewImpl::convertViewportToWindow(blink::WebRect* rect) {
+  if (IsUseZoomForDSFEnabled()) {
+    float reverse = 1 / device_scale_factor_;
+    // TODO(oshima): We may wait to allow pixel precision here as the the
+    // anchor element can be placed at half pixel.
+    gfx::Rect window_rect =
+        gfx::ScaleToEnclosedRect(gfx::Rect(*rect), reverse);
+    rect->x = window_rect.x();
+    rect->y = window_rect.y();
+    rect->width = window_rect.width();
+    rect->height = window_rect.height();
+  }
+}
+
 void RenderViewImpl::didChangeIcon(WebLocalFrame* frame,
                                    WebIconURL::Type icon_type) {
   if (frame->parent())