Draggable region support for frameless app window on CrOS.

ui/views/widget/widget_delegate.h

Index: ui/views/widget/widget_delegate.h
diff --git a/ui/views/widget/widget_delegate.h b/ui/views/widget/widget_delegate.h
index 33f3ccd5de25acf6582d222581cbda7f50b9e782..bb348426fc716d4c0b89ca4b1779a80c0923f6f8 100644
--- a/ui/views/widget/widget_delegate.h
+++ b/ui/views/widget/widget_delegate.h
@@ -147,6 +147,14 @@ class VIEWS_EXPORT WidgetDelegate {
   // Provides the hit-test mask if HasHitTestMask above returns true.
   virtual void GetHitTestMask(gfx::Path* mask) const;
 
+  // Returns true if event handling should descend into |child|.
+  // |event_location| is in terms of the Window. |event_type| specifies the
+  // type of the event.
+  virtual bool ShouldDescendIntoChildForEventHandling(
+      aura::Window* child,

[Ben Goodger (Google), 2012/08/21 02:17:40]

This won't compile on non-aura builds. You have to pass gfx::NativeView instead.

[jianli, 2012/08/21 17:22:00]

Done.

+      const gfx::Point& event_location,
+      ui::EventType event_type);
+
  protected:
   virtual ~WidgetDelegate() {}