API proposal for chrome.app.window to intercept all keys.

apps/app_window.h

Index: apps/app_window.h
diff --git a/apps/app_window.h b/apps/app_window.h
index cbfab8b2cd2622ab1634fcf3834e9ef3bed8f80b..69791c5663fafe73af6fc51811e26e4e8e965693 100644
--- a/apps/app_window.h
+++ b/apps/app_window.h
@@ -376,6 +376,10 @@ class AppWindow : public content::NotificationObserver,
   // may be false if the bit is silently switched off for security reasons.
   bool IsAlwaysOnTop() const;
 
+  // Set whether the window should get even reserved keys (modulo platform
+  // restrictions).
+  void SetInterceptAllKeys(bool want_all_keys);
+
   // Retrieve the current state of the app window as a dictionary, to pass to
   // the renderer.
   void GetSerializedState(base::DictionaryValue* properties) const;
@@ -592,6 +596,10 @@ class AppWindow : public content::NotificationObserver,
   // Whether |transparent_background| was set in the CreateParams.
   bool requested_transparent_background_;
 
+  // Cached value of InterceptAllKeys property that is used to save/restore
+  // state as the window is active/loses focus.
+  bool cached_want_all_keys_;
+
   DISALLOW_COPY_AND_ASSIGN(AppWindow);
 };