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 f2e0e98d815be3c42a10bc939588a7e3cf0d1307..13b37c8bab10f765860816dc5bc1f918b73f8e02 100644
--- a/apps/app_window.h
+++ b/apps/app_window.h
@@ -354,6 +354,10 @@ 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;
@@ -462,6 +466,9 @@ class AppWindow : public content::NotificationObserver,
   // Update the always-on-top bit in the native app window.
   void UpdateNativeAlwaysOnTop();
 
+  // Update the intercept-all-keys bit in the native app window.
+  void UpdateNativeInterceptAllKeys();
+
   // Sends the onWindowShown event to the app if the window has been shown. Only
   // has an effect in tests.
   void SendOnWindowShownIfShown();
@@ -558,6 +565,10 @@ class AppWindow : public content::NotificationObserver,
   // taskbar.
   bool cached_always_on_top_;
 
+  // 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);
 };