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

ui/views/widget/desktop_aura/desktop_window_tree_host_win.h

Index: ui/views/widget/desktop_aura/desktop_window_tree_host_win.h
diff --git a/ui/views/widget/desktop_aura/desktop_window_tree_host_win.h b/ui/views/widget/desktop_aura/desktop_window_tree_host_win.h
index d61080aeae898b6d66a7393c213a6fd5c7f7008c..0f802a46d850f5a60f7bff8d15f5fe17491b976a 100644
--- a/ui/views/widget/desktop_aura/desktop_window_tree_host_win.h
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host_win.h
@@ -22,6 +22,7 @@ class ScopedTooltipDisabler;
 namespace views {
 class DesktopCursorClient;
 class DesktopDragDropClientWin;
+class DesktopKeyboardCaptureWin;
 class HWNDMessageHandler;
 
 namespace corewm {
@@ -79,6 +80,7 @@ class VIEWS_EXPORT DesktopWindowTreeHostWin
   virtual bool IsMinimized() const OVERRIDE;
   virtual bool HasCapture() const OVERRIDE;
   virtual void SetAlwaysOnTop(bool always_on_top) OVERRIDE;
+  virtual void SetInterceptAllKeys(bool want_all_keys) OVERRIDE;
   virtual bool IsAlwaysOnTop() const OVERRIDE;
   virtual void SetVisibleOnAllWorkspaces(bool always_visible) OVERRIDE;
   virtual bool SetWindowTitle(const base::string16& title) OVERRIDE;
@@ -267,6 +269,9 @@ class VIEWS_EXPORT DesktopWindowTreeHostWin
 
   scoped_ptr<aura::client::ScopedTooltipDisabler> tooltip_disabler_;
 
+  // Maintain keyboard hook request.
+  scoped_ptr<DesktopKeyboardCaptureWin> keyboard_capture_;
+
   DISALLOW_COPY_AND_ASSIGN(DesktopWindowTreeHostWin);
 };