Enable keyboard shortcuts and some menu commands for browserless Panels.

chrome/browser/ui/panels/panel_host.h

Index: chrome/browser/ui/panels/panel_host.h
diff --git a/chrome/browser/ui/panels/panel_host.h b/chrome/browser/ui/panels/panel_host.h
index 4ed270b58bdbf51194f6f367a848262aeeb47013..e6afc0c1bda5f5d08bd317d7b895e8324b0a843d 100644
--- a/chrome/browser/ui/panels/panel_host.h
+++ b/chrome/browser/ui/panels/panel_host.h
@@ -53,7 +53,12 @@ class PanelHost : public content::WebContentsDelegate,
                             const gfx::Rect& pos) OVERRIDE;
   virtual bool IsPopupOrPanel(
       const content::WebContents* source) const OVERRIDE;
+  virtual void ContentsZoomChange(bool zoom_in) OVERRIDE;
   virtual bool IsApplication() const OVERRIDE;
+  virtual bool HandleContextMenu(
+      const content::ContextMenuParams& params) OVERRIDE;
+  virtual void HandleKeyboardEvent(
+      const content::NativeWebKeyboardEvent& event) OVERRIDE;
   virtual void ResizeDueToAutoResize(content::WebContents* web_contents,
                                      const gfx::Size& new_size) OVERRIDE;