Fix bug 105043: Panels [WIN]: For minimize panels, taskbar hover preview show the 4-pixel represent…

chrome/browser/ui/panels/panel_browser_view.h

Index: chrome/browser/ui/panels/panel_browser_view.h
diff --git a/chrome/browser/ui/panels/panel_browser_view.h b/chrome/browser/ui/panels/panel_browser_view.h
index ab2aa634766b48f57fcd078c5655792d80261e4e..5a5d82c0fa9dbec699f44f6a0f59b7097826ee1a 100644
--- a/chrome/browser/ui/panels/panel_browser_view.h
+++ b/chrome/browser/ui/panels/panel_browser_view.h
@@ -32,6 +32,9 @@ class PanelBrowserView : public BrowserView,
   Panel* panel() const { return panel_.get(); }
   bool closed() const { return closed_; }
   bool focused() const { return focused_; }
+  bool force_to_paint_as_inactive() const {
+    return force_to_paint_as_inactive_;
+  }
 
   PanelBrowserFrameView* GetFrameView() const;
 
@@ -80,6 +83,7 @@ class PanelBrowserView : public BrowserView,
   virtual bool WillProcessWorkAreaChange() const OVERRIDE;
   virtual void OnWindowBeginUserBoundsChange() OVERRIDE;
   virtual void OnWindowEndUserBoundsChange() OVERRIDE;
+  virtual SkBitmap GetPreviewImage(const gfx::Size& size, bool live) OVERRIDE;
 
   // Overridden from views::Widget::Observer
   virtual void OnWidgetActivationChanged(views::Widget* widget,
@@ -125,6 +129,9 @@ class PanelBrowserView : public BrowserView,
   virtual void SetPanelAlwaysOnTop(bool on_top) OVERRIDE;
   virtual void EnableResizeByMouse(bool enable) OVERRIDE;
   virtual void UpdatePanelMinimizeRestoreButtonVisibility() OVERRIDE;
+  virtual void PanelExpansionStateChanging(
+      Panel::ExpansionState old_state,
+      Panel::ExpansionState new_state) OVERRIDE;
 
   // Overridden from AnimationDelegate:
   virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE;
@@ -145,6 +152,10 @@ class PanelBrowserView : public BrowserView,
   void UpdateWindowAttribute(int attribute_index,
                              int attribute_value,
                              bool to_set);
+
+  // Captures and returns the screenshot of the panel window. The caller is
+  // responsible to release the returned SkBitmap instance.
+  SkBitmap CaptureWindowImage();
 #endif
 
   scoped_ptr<Panel> panel_;
@@ -175,12 +186,22 @@ class PanelBrowserView : public BrowserView,
   // Is the panel in highlighted state to draw people's attention?
   bool is_drawing_attention_;
 
+  // Should we force to paint the panel as inactive? This is needed when we need
+  // to capture the screenshot before an active panel goes minimized.
+  bool force_to_paint_as_inactive_;
+
   // The last view that had focus in the panel. This is saved so that focus can
   // be restored properly when a drag ends.
   views::View* old_focused_view_;
 
   content::NotificationRegistrar registrar_;
 
+#if defined(OS_WIN) && !defined(USE_AURA)
+  // The bitmap of panel screenshot before it is minimized. This is used to
+  // replace the live preview thumbnail when the panel is minimized.
+  scoped_ptr<SkBitmap> capture_bitmap_;
+#endif
+
   DISALLOW_COPY_AND_ASSIGN(PanelBrowserView);
 };