linux_aura: Improve window drag performance.

ui/views/widget/desktop_aura/x11_desktop_window_move_client.h

Index: ui/views/widget/desktop_aura/x11_desktop_window_move_client.h
diff --git a/ui/views/widget/desktop_aura/x11_desktop_window_move_client.h b/ui/views/widget/desktop_aura/x11_desktop_window_move_client.h
index 1a8b5884ac13ac1c52b7e2a09b111117be3d3dc2..3be6a63c3257afe0c21890dec07fb0ab33b5f6b9 100644
--- a/ui/views/widget/desktop_aura/x11_desktop_window_move_client.h
+++ b/ui/views/widget/desktop_aura/x11_desktop_window_move_client.h
@@ -13,6 +13,7 @@
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/message_loop/message_loop.h"
+#include "base/timer/timer.h"
 #include "ui/aura/client/window_move_client.h"
 #include "ui/gfx/point.h"
 #include "ui/views/views_export.h"
@@ -23,6 +24,10 @@ namespace aura {
 class RootWindow;
 }
 
+namespace gfx {
+class Rect;
+}
+
 namespace views {
 
 // When we're dragging tabs, we need to manually position our window.
@@ -46,6 +51,9 @@ class VIEWS_EXPORT X11DesktopWindowMoveClient :
   virtual void EndMoveLoop() OVERRIDE;
 
  private:
+  // Callback from |window_move_timer_|.
+  void SetHostBounds(const gfx::Rect& rect);
+
   X11WholeScreenMoveLoop move_loop_;
 
   // We need to keep track of this so we can actually move it when reacting to
@@ -56,6 +64,8 @@ class VIEWS_EXPORT X11DesktopWindowMoveClient :
   // started. Used to calculate the window's new bounds relative to the current
   // location of the cursor.
   gfx::Vector2d window_offset_;
+
+  base::OneShotTimer<X11DesktopWindowMoveClient> window_move_timer_;
 };
 
 }  // namespace views