Make panel adjust bounds per preferred size change notification on Windows.

chrome/browser/ui/panels/panel_browser_window_gtk.cc

Index: chrome/browser/ui/panels/panel_browser_window_gtk.cc
===================================================================
--- chrome/browser/ui/panels/panel_browser_window_gtk.cc	(revision 95921)
+++ chrome/browser/ui/panels/panel_browser_window_gtk.cc	(working copy)
@@ -181,6 +181,20 @@
   DestroyBrowser();
 }
 
+gfx::Size PanelBrowserWindowGtk::GetNonClientAreaExtent() const {
+  NOTIMPLEMENTED();
+  return gfx::Size();
+}
+
+int PanelBrowserWindowGtk::GetRestoredHeight() const {
+  NOTIMPLEMENTED();
+  return 0;
+}
+
+void PanelBrowserWindowGtk::SetRestoredHeight(int height) {
+  NOTIMPLEMENTED();
+}
+
 NativePanelTesting* PanelBrowserWindowGtk::GetNativePanelTesting() {
   return this;
 }