content: Make conversions from gfx::Point to PointF explicit.

This implicit conversion operator will be going away.

BUG=342848

Review URL: https://codereview.chromium.org/1419693003

Cr-Commit-Position: refs/heads/master@{#355343}
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index 96b0166f..bb917e53 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -770,8 +770,8 @@
 
   // Popups may be displaced when screen metrics emulation is enabled.
   // These values are used to properly adjust popup position.
-  gfx::PointF popup_view_origin_for_emulation_;
-  gfx::PointF popup_screen_origin_for_emulation_;
+  gfx::Point popup_view_origin_for_emulation_;
+  gfx::Point popup_screen_origin_for_emulation_;
   float popup_origin_scale_for_emulation_;
 
   scoped_refptr<FrameSwapMessageQueue> frame_swap_message_queue_;