Addition testing for panels drag and drop.

chrome/browser/ui/panels/panel_manager.h

Index: chrome/browser/ui/panels/panel_manager.h
diff --git a/chrome/browser/ui/panels/panel_manager.h b/chrome/browser/ui/panels/panel_manager.h
index 1ece64e120af31f8cac463b18e707199e876d5f6..e2cc0fb7c070909a399f53a81179c245c24e1495 100644
--- a/chrome/browser/ui/panels/panel_manager.h
+++ b/chrome/browser/ui/panels/panel_manager.h
@@ -55,6 +55,10 @@ class PanelManager {
 
   PanelManager();
 
+#if UNIT_TEST
+  Panels panels() { return panels_; }

[jianli, 2011/08/24 22:04:03]

Please define it as:
  const Panels& panels() const { return panels_; }

[prasadt, 2011/08/24 23:04:30]

Done.

+#endif
+
   // Applies the new work area. This is called by OnDisplayChanged and the test
   // code.
   void SetWorkArea(const gfx::Rect& work_area);
@@ -84,6 +88,9 @@ class PanelManager {
   void DragLeft();
   void DragRight();
 
+  // Horizontal spacing between panels.  Used for unit testing.
+  static int horizontal_spacing();
+
   Panels panels_;
 
   // Stores the panels that are pending to remove. We want to delay the removal