linux/x11: Fix setting window bounds in High DPI.

ui/aura/window_tree_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_WINDOW_TREE_HOST_H_
 #define UI_AURA_WINDOW_TREE_HOST_H_
 
 #include <vector>
 
 #include "base/event_types.h"
@@ skipping 111 matching lines @@
 
   // Returns the accelerated widget.
   virtual gfx::AcceleratedWidget GetAcceleratedWidget() = 0;
 
   // Shows the WindowTreeHost.
   virtual void Show() = 0;
 
   // Hides the WindowTreeHost.
   virtual void Hide() = 0;
 
-  // Gets/Sets the size of the WindowTreeHost.
+  // Gets/Sets the size of the WindowTreeHost (in pixels).
   virtual gfx::Rect GetBounds() const = 0;
   virtual void SetBounds(const gfx::Rect& bounds) = 0;
 
   // Sets the OS capture to the root window.
   virtual void SetCapture() = 0;
 
   // Releases OS capture of the root window.
   virtual void ReleaseCapture() = 0;
 
  protected:
@@ skipping 48 matching lines @@
   gfx::Point last_cursor_request_position_in_host_;
 
   scoped_ptr<ui::ViewProp> prop_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTreeHost);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_TREE_HOST_H_