Support detaching/attaching panels via inter-strip drags.

chrome/browser/ui/panels/overflow_panel_strip.cc

Index: chrome/browser/ui/panels/overflow_panel_strip.cc
diff --git a/chrome/browser/ui/panels/overflow_panel_strip.cc b/chrome/browser/ui/panels/overflow_panel_strip.cc
index ce4505b2fb97569d08373c9efc0c9444a06cb0c2..145b96e951dd753e1f5a3156872c8da7ab363242 100644
--- a/chrome/browser/ui/panels/overflow_panel_strip.cc
+++ b/chrome/browser/ui/panels/overflow_panel_strip.cc
@@ -190,20 +190,35 @@ bool OverflowPanelStrip::CanShowPanelAsActive(const Panel* panel) const {
   return false;
 }
 
+void OverflowPanelStrip::SavePanelPlacement(Panel* panel) {
+  NOTREACHED();
+}
+
+void OverflowPanelStrip::RestorePanelToSavedPlacement() {
+  NOTREACHED();
+}
+
+void OverflowPanelStrip::DiscardSavedPanelPlacement() {
+  NOTREACHED();
+}
+
 bool OverflowPanelStrip::CanDragPanel(const Panel* panel) const {
   // All overflow panels are not draggable.
   return false;
 }
 
-void OverflowPanelStrip::StartDraggingPanel(Panel* panel) {
+void OverflowPanelStrip::StartDraggingPanelWithinStrip(Panel* panel) {
   NOTREACHED();
 }
 
-void OverflowPanelStrip::DragPanel(Panel* panel, int delta_x, int delta_y) {
+void OverflowPanelStrip::DragPanelWithinStrip(Panel* panel,
+                                              int delta_x,
+                                              int delta_y) {
   NOTREACHED();
 }
 
-void OverflowPanelStrip::EndDraggingPanel(Panel* panel, bool cancelled) {
+void OverflowPanelStrip::EndDraggingPanelWithinStrip(Panel* panel,
+                                                     bool aborted) {
   NOTREACHED();
 }