Propagate window coordinates to out-of-process iframes renderers.

content/renderer/devtools/render_widget_screen_metrics_emulator.h

Index: content/renderer/devtools/render_widget_screen_metrics_emulator.h
diff --git a/content/renderer/devtools/render_widget_screen_metrics_emulator.h b/content/renderer/devtools/render_widget_screen_metrics_emulator.h
index 8288dfa6ebf1084e958211faa5fda2009acc45d0..b2c6e2a0ca3f0834708979da90dd0334e44e240b 100644
--- a/content/renderer/devtools/render_widget_screen_metrics_emulator.h
+++ b/content/renderer/devtools/render_widget_screen_metrics_emulator.h
@@ -54,6 +54,7 @@ class RenderWidgetScreenMetricsEmulator {
   // The following methods alter handlers' behavior for messages related to
   // widget size and position.
   void OnResize(const ResizeParams& params);
+  void OnUpdateWindowScreenRectMessage(const gfx::Rect& window_screen_rect);

[nasko, 2016/03/03 18:28:57]

nit: No need for Message suffix, all IPC handlers by design are handing
messages.

[lfg, 2016/03/03 22:09:38]

Done.

   void OnUpdateScreenRects(const gfx::Rect& view_screen_rect,
                            const gfx::Rect& window_screen_rect);
   void OnShowContextMenu(ContextMenuParams* params);