Support detaching/attaching panels via inter-strip drags.

chrome/browser/ui/panels/panel_window_controller_cocoa.h

Index: chrome/browser/ui/panels/panel_window_controller_cocoa.h
diff --git a/chrome/browser/ui/panels/panel_window_controller_cocoa.h b/chrome/browser/ui/panels/panel_window_controller_cocoa.h
index 21fee91f6e4af309b10b1ffb04e520f912116775..a62f31567192456f20074a10f5a4a12c5836acb6 100644
--- a/chrome/browser/ui/panels/panel_window_controller_cocoa.h
+++ b/chrome/browser/ui/panels/panel_window_controller_cocoa.h
@@ -98,11 +98,11 @@ class PanelBrowserWindowCocoa;
               animate:(BOOL)animate;
 
 // Used by PanelTitlebarViewCocoa when user rearranges the Panels by dragging.
+// |mouseLocation| is in screen coordinates.
 - (BOOL)isDraggable;
-- (void)startDrag;
+- (void)startDrag:(NSPoint)mouseLocation;
 - (void)endDrag:(BOOL)cancelled;
-- (void)dragWithDeltaX:(int)deltaX
-                deltaY:(int)deltaY;
+- (void)drag:(NSPoint)mouseLocation;
 
 // Accessor for titlebar view.
 - (PanelTitlebarViewCocoa*)titlebarView;
@@ -144,6 +144,8 @@ class PanelBrowserWindowCocoa;
 
 - (void)ensureFullyVisible;
 
+- (void)setAlwaysOnTop:(bool)onTop;
+
 @end  // @interface PanelWindowController
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_