Support detaching/attaching panels via inter-strip drags.

chrome/browser/ui/panels/panel_titlebar_view_cocoa.h

Index: chrome/browser/ui/panels/panel_titlebar_view_cocoa.h
diff --git a/chrome/browser/ui/panels/panel_titlebar_view_cocoa.h b/chrome/browser/ui/panels/panel_titlebar_view_cocoa.h
index a93f5b8c231dafb9873a7abb7aa52ff1df10c69f..4c741e43bec10b99906f8fec0ac27e837e610748 100644
--- a/chrome/browser/ui/panels/panel_titlebar_view_cocoa.h
+++ b/chrome/browser/ui/panels/panel_titlebar_view_cocoa.h
@@ -58,7 +58,7 @@ enum PanelDragState {
   ScopedCrTrackingArea closeButtonTrackingArea_;
   PanelDragState dragState_;
   BOOL isDrawingAttention_;
-  NSPoint dragStartLocation_;
+  NSPoint dragStartLocation_;  // in screen coordinates.
   // "Glint" animation is used in "Draw Attention" mode.
   scoped_nsobject<RepaintAnimation> glintAnimation_;
   scoped_nsobject<NSTimer> glintAnimationTimer_;
@@ -89,10 +89,10 @@ enum PanelDragState {
 - (void)didChangeMainWindow:(NSNotification*)notification;
 
 // Helpers to control title drag operation, called from more then one place.
-- (void)startDrag;
+// |mouseLocation| is in screen coordinates.
+- (void)startDrag:(NSPoint)mouseLocation;
 - (void)endDrag:(BOOL)cancelled;
-- (void)dragWithDeltaX:(int)deltaX
-                deltaY:(int)deltaY;
+- (void)drag:(NSPoint)mouseLocation;
 
   // Update the visibility of settings button.
 - (void)updateSettingsButtonVisibility:(BOOL)mouseOverWindow;
@@ -122,10 +122,9 @@ enum PanelDragState {
 - (void)simulateCloseButtonClick;
 
 // NativePanelTesting support.
-- (void)pressLeftMouseButtonTitlebar;
+- (void)pressLeftMouseButtonTitlebar:(NSPoint)mouseLocation;
 - (void)releaseLeftMouseButtonTitlebar;
-- (void)dragTitlebarDeltaX:(double)delta_x
-                    deltaY:(double)delta_y;
+- (void)dragTitlebar:(NSPoint)mouseLocation;
 - (void)cancelDragTitlebar;
 - (void)finishDragTitlebar;