Panel auto-resize for GTK.

chrome/browser/ui/panels/panel.h

Index: chrome/browser/ui/panels/panel.h
diff --git a/chrome/browser/ui/panels/panel.h b/chrome/browser/ui/panels/panel.h
index cb843d379be1c75ac09cb5c86ddfd4ae25e81f65..56838004fa813c432c6c890720486870e9fefb7c 100644
--- a/chrome/browser/ui/panels/panel.h
+++ b/chrome/browser/ui/panels/panel.h
@@ -176,6 +176,10 @@ class Panel : public BrowserWindow, public NotificationObserver {
   // Returns NULL if it cannot be found.
   static const Extension* GetExtensionFromBrowser(Browser* browser);
 
+  // Used on platforms where the panel cannot determine its non-client area
+  // until the window has been created. (e.g. GTK)
+  void OnNonClientExtentAvailable();
+
   NativePanel* native_panel() { return native_panel_; }
   Browser* browser() const;
   ExpansionState expansion_state() const { return expansion_state_; }