Support detaching/attaching panels via inter-strip drags.

chrome/browser/ui/panels/detached_panel_strip.cc

Index: chrome/browser/ui/panels/detached_panel_strip.cc
diff --git a/chrome/browser/ui/panels/detached_panel_strip.cc b/chrome/browser/ui/panels/detached_panel_strip.cc
index c0e35acc42f22ff492f1563fbccca5d44eaee820..ac9a513f53433986b27fa2f6ac71466c8a523165 100644
--- a/chrome/browser/ui/panels/detached_panel_strip.cc
+++ b/chrome/browser/ui/panels/detached_panel_strip.cc
@@ -38,6 +38,15 @@ void DetachedPanelStrip::AddPanel(Panel* panel) {
   panels_.insert(panel);
 }
 
+void DetachedPanelStrip::AddPanelAtPosition(Panel* panel,
+                                            const gfx::Point& position) {
+  AddPanel(panel);
+
+  gfx::Rect new_bounds(panel->GetBounds());
+  new_bounds.set_origin(position);
+  panel->SetPanelBounds(new_bounds);
+}
+
 bool DetachedPanelStrip::RemovePanel(Panel* panel) {
   return panels_.erase(panel) != 0;
 }