Add a way to fetch window frame metrics from NativeShellWindow

chrome/browser/ui/panels/panel.cc

Index: chrome/browser/ui/panels/panel.cc
diff --git a/chrome/browser/ui/panels/panel.cc b/chrome/browser/ui/panels/panel.cc
index be52d978fff3bd5f7e54d81d331ee4570e077613..0ca77766494db2ebd51027b4872c8177c2cd94a8 100644
--- a/chrome/browser/ui/panels/panel.cc
+++ b/chrome/browser/ui/panels/panel.cc
@@ -472,6 +472,16 @@ bool Panel::IsAlwaysOnTop() const {
   return native_panel_->IsPanelAlwaysOnTop();
 }
 
+gfx::Rect Panel::ContentBoundsForWindowBounds(
+    const gfx::Rect& window_bounds) const {
+  return window_bounds;
+}
+
+gfx::Rect Panel::WindowBoundsForContentBounds(
+    const gfx::Rect& content_bounds) const {
+  return content_bounds;
+}
+
 gfx::NativeWindow Panel::GetNativeWindow() {
   return native_panel_->GetNativePanelHandle();
 }