Cleanup to keep panel from manipulating its panel strip assignment directly.

chrome/browser/ui/panels/docked_panel_strip.h

Index: chrome/browser/ui/panels/docked_panel_strip.h
diff --git a/chrome/browser/ui/panels/docked_panel_strip.h b/chrome/browser/ui/panels/docked_panel_strip.h
index 2fb002943a84d77ae1a730dd4bf1c3e73b0a1e1a..149c5d0393051fc5ee8a9e586aaf8e76661796c2 100644
--- a/chrome/browser/ui/panels/docked_panel_strip.h
+++ b/chrome/browser/ui/panels/docked_panel_strip.h
@@ -43,7 +43,7 @@ class DockedPanelStrip : public PanelStrip,
   // Adds a panel to the strip. The panel may be a newly created panel or one
   // that is transitioning from another grouping of panels.
   virtual void AddPanel(Panel* panel) OVERRIDE;
-  virtual bool RemovePanel(Panel* panel) OVERRIDE;
+  virtual void RemovePanel(Panel* panel) OVERRIDE;
   virtual void CloseAll() OVERRIDE;
   virtual void ResizePanelWindow(
       Panel* panel,
@@ -52,6 +52,7 @@ class DockedPanelStrip : public PanelStrip,
   virtual void ActivatePanel(Panel* panel) OVERRIDE;
   virtual void MinimizePanel(Panel* panel) OVERRIDE;
   virtual void RestorePanel(Panel* panel) OVERRIDE;
+  virtual bool IsPanelMinimized(const Panel* panel) const OVERRIDE;
   virtual bool CanShowPanelAsActive(const Panel* panel) const OVERRIDE;
   virtual bool CanDragPanel(const Panel* panel) const OVERRIDE;
   virtual void StartDraggingPanel(Panel* panel) OVERRIDE;
@@ -78,6 +79,7 @@ class DockedPanelStrip : public PanelStrip,
   // do NOT have a temporary layout.
   int num_panels() const { return panels_.size(); }
   const Panels& panels() const { return panels_; }
+  Panel* last_panel() const { return panels_.empty() ? NULL : panels_.back(); }
 
   gfx::Rect display_area() const { return display_area_; }
 
@@ -91,6 +93,13 @@ class DockedPanelStrip : public PanelStrip,
 
   void OnFullScreenModeChanged(bool is_full_screen);
 
+  // Returns |true| if panel can fit in the dock strip.
+  bool CanFitPanel(const Panel* panel) const;
+
+  // Used to temporarily disable/re-enable layout refreshes while manipulating
+  // multiple panels at a time.
+  void enable_layout_refresh(bool enable) { layout_refresh_enabled_ = enable; }
+
 #ifdef UNIT_TEST
   int num_temporary_layout_panels() const {
     return panels_in_temporary_layout_.size();
@@ -146,9 +155,9 @@ class DockedPanelStrip : public PanelStrip,
   int minimized_panel_count_;
   bool are_titlebars_up_;
 
-  // |True| to temporarily prevent refreshing panel layout, e.g. while
+  // |False| to temporarily prevent refreshing panel layout, e.g. while
   // moving panels to overflow area to make room for a panel in this strip.
-  bool disable_layout_refresh_;
+  bool layout_refresh_enabled_;
 
   // Referring to current position in |panels_| where the dragging panel
   // resides.