Add key modifier on minimize/restore button click to minimize/restore all Panels for Mac.

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 132c52e91ab6379be23a12db6437b5b761fe7f4d..9442b8399561d2dc420f64e36b057e5e3d1e27e2 100644
--- a/chrome/browser/ui/panels/docked_panel_strip.h
+++ b/chrome/browser/ui/panels/docked_panel_strip.h
@@ -60,6 +60,8 @@ class DockedPanelStrip : public PanelStrip,
   virtual void ActivatePanel(Panel* panel) OVERRIDE;
   virtual void MinimizePanel(Panel* panel) OVERRIDE;
   virtual void RestorePanel(Panel* panel) OVERRIDE;
+  virtual void MinimizeAll() OVERRIDE;
+  virtual void RestoreAll() OVERRIDE;
   virtual bool CanMinimizePanel(const Panel* panel) const OVERRIDE;
   virtual bool IsPanelMinimized(const Panel* panel) const OVERRIDE;
   virtual void SavePanelPlacement(Panel* panel) OVERRIDE;
@@ -156,10 +158,6 @@ class DockedPanelStrip : public PanelStrip,
   void AdjustPanelBoundsPerExpansionState(Panel* panel,
       gfx::Rect* panel_bounds);
 
-  // Minimizes/Restores all panels in the strip depending on the current
-  // state of |panel|.
-  void ToggleMinimizeAll(Panel* panel);
-
   // Help functions to drag the given panel.
   void DragLeft(Panel* dragging_panel);
   void DragRight(Panel* dragging_panel);