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

content/renderer/devtools/render_widget_screen_metrics_emulator.cc

Index: content/renderer/devtools/render_widget_screen_metrics_emulator.cc
diff --git a/content/renderer/devtools/render_widget_screen_metrics_emulator.cc b/content/renderer/devtools/render_widget_screen_metrics_emulator.cc
index b92d637c9f9423e1b4aecd6f9ca090cbd683b728..bad6fa72699b8e76b6a3c4fee6b52ceca3bc24dc 100644
--- a/content/renderer/devtools/render_widget_screen_metrics_emulator.cc
+++ b/content/renderer/devtools/render_widget_screen_metrics_emulator.cc
@@ -139,6 +139,14 @@ void RenderWidgetScreenMetricsEmulator::OnResize(const ResizeParams& params) {
     delegate_->Redraw();
 }
 
+void RenderWidgetScreenMetricsEmulator::OnUpdateWindowScreenRect(
+    const gfx::Rect& window_screen_rect) {
+  original_window_screen_rect_ = window_screen_rect;
+  if (emulation_params_.screenPosition ==
+      blink::WebDeviceEmulationParams::Desktop)
+    Apply();
+}
+
 void RenderWidgetScreenMetricsEmulator::OnUpdateScreenRects(
     const gfx::Rect& view_screen_rect,
     const gfx::Rect& window_screen_rect) {