Aura/ash split: Don't use X11 window borders.

ui/aura/root_window_host.h

Index: ui/aura/root_window_host.h
diff --git a/ui/aura/root_window_host.h b/ui/aura/root_window_host.h
index 47bba42b8e40aa74f785282931147f31a0d3d2f5..c886baa2ca41b00a9e8fb199934fdba62546d4fa 100644
--- a/ui/aura/root_window_host.h
+++ b/ui/aura/root_window_host.h
@@ -18,6 +18,7 @@ class Size;
 
 namespace aura {
 
+class MouseEvent;
 class RootWindow;
 
 // RootWindowHost bridges between a native window and the embedded RootWindow.
@@ -92,6 +93,15 @@ class RootWindowHost {
 #if !defined(OS_MACOSX)
   virtual void PostNativeEvent(const base::NativeEvent& native_event) = 0;
 #endif
+
+  // Used to enable or disable the native window borders on a window.
+  virtual void SetUseOSWindowBorders(bool use_os_borders) = 0;
+
+  // Signal to the OS that it should start acting as if we're dragging the
+  // window, either for movement or resizing. Returns true if we need to stop
+  // event propagation.
+  virtual bool DispatchWindowDragMovement(int hittest,
+                                          MouseEvent* event) = 0;
 };
 
 }  // namespace aura