Resubmit: Open the WrenchMenu on mouseover when dragging a browser action

chrome/browser/ui/views/toolbar/wrench_toolbar_button.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_TOOLBAR_WRENCH_TOOLBAR_BUTTON_H_
 #define CHROME_BROWSER_UI_VIEWS_TOOLBAR_WRENCH_TOOLBAR_BUTTON_H_
 
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "chrome/browser/ui/toolbar/wrench_icon_painter.h"
 #include "ui/views/controls/button/menu_button.h"
 
+class ToolbarView;
+
 // TODO(gbillock): Rename this? No longer a wrench.
 class WrenchToolbarButton : public views::MenuButton,
                             public WrenchIconPainter::Delegate {
  public:
-  explicit WrenchToolbarButton(views::MenuButtonListener* menu_button_listener);
+  explicit WrenchToolbarButton(ToolbarView* toolbar_view);
   virtual ~WrenchToolbarButton();
 
   void SetSeverity(WrenchIconPainter::Severity severity, bool animate);
 
   // views::MenuButton:
   virtual gfx::Size GetPreferredSize() const OVERRIDE;
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
 
   // WrenchIconPainter::Delegate:
   virtual void ScheduleWrenchIconPaint() OVERRIDE;
 
+  // Opens the wrench menu immediately during a drag-and-drop operation.
+  // Used only in testing.
+  static bool g_open_wrench_immediately_for_testing;
+
  private:
+  // views::View:
+  virtual bool GetDropFormats(int* formats,
+      std::set<ui::OSExchangeData::CustomFormat>* custom_formats) OVERRIDE;
+  virtual bool AreDropTypesRequired() OVERRIDE;
+  virtual bool CanDrop(const ui::OSExchangeData& data) OVERRIDE;
+  virtual void OnDragEntered(const ui::DropTargetEvent& event) OVERRIDE;
+  virtual int OnDragUpdated(const ui::DropTargetEvent& event) OVERRIDE;
+  virtual void OnDragExited() OVERRIDE;
+  virtual int OnPerformDrop(const ui::DropTargetEvent& event) OVERRIDE;
+
+  // Show the extension action overflow menu (which is in the app menu).
+  void ShowOverflowMenu();
+
   scoped_ptr<WrenchIconPainter> wrench_icon_painter_;
 
+  // Our owning toolbar view.
+  ToolbarView* toolbar_view_;
+
+  // Whether or not we should allow dragging extension icons onto this button
+  // (in order to open the overflow in the app/wrench menu).
+  bool allow_extension_dragging_;
+
+  // Used to spawn weak pointers for delayed tasks to open the overflow menu.
+  base::WeakPtrFactory<WrenchToolbarButton> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(WrenchToolbarButton);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_WRENCH_TOOLBAR_BUTTON_H_