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

ui/aura/root_window_host.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_AURA_ROOT_WINDOW_HOST_H_
 #define UI_AURA_ROOT_WINDOW_HOST_H_
 #pragma once
 
 #include "base/message_loop.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace gfx {
 class Point;
 class Rect;
 class Size;
 }
 
 namespace aura {
 
+class MouseEvent;
 class RootWindow;
 
 // RootWindowHost bridges between a native window and the embedded RootWindow.
 // It provides the accelerated widget and maps events from the native os to
 // aura.
 class RootWindowHost {
  public:
   virtual ~RootWindowHost() {}
 
   // Creates a new RootWindowHost. The caller owns the returned value.
@@ skipping 54 matching lines @@
   // Moves the cursor to the specified location relative to the root window.
   virtual void MoveCursorTo(const gfx::Point& location) = 0;
 
   // Sets if the window should be focused when shown.
   virtual void SetFocusWhenShown(bool focus_when_shown) = 0;
 
   // Posts |native_event| to the platform's event queue.
 #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 SetUseHostWindowBorders(bool use_os_borders) = 0;

[Ben Goodger (Google), 2012/05/10 14:52:58]

So I'd rather not expose chrome-ui related functionality on aura types. Is there
a way you can do this from a type outside of aura? e.g. on Windows we get the
host's accelerated widget (HWND) and install a win32 window subclass on it
(basically replace the window procedure) which allows us to respond differently
to messages etc.

+
+  // 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 DispatchHostWindowDragMovement(int hittest,
+                                              MouseEvent* event) = 0;

[Ben Goodger (Google), 2012/05/10 14:52:58]

similar to above. seems like you could attach a helper to the root window host
linux that intercepts mouse moves and does this when appropriate.

 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_HOST_H_