2x Cursor support.

ui/aura/root_window.cc

 // 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.
 
 #include "ui/aura/root_window.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 567 matching lines @@
     draw_on_compositing_end_ = false;
 
     // Call ScheduleDraw() instead of Draw() in order to allow other
     // ui::CompositorObservers to be notified before starting another
     // draw cycle.
     ScheduleDraw();
   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+// RootWindow, ui::LayerDelegate implementation:
+void RootWindow::OnDeviceScaleFactorChanged(
+    float device_scale_factor) {
+  if (cursor_shown_)
+    ShowCursor(false);
+  host_->OnDeviceScaleFactorChanged(device_scale_factor);
+  Window::OnDeviceScaleFactorChanged(device_scale_factor);
+  if (cursor_shown_)
+    ShowCursor(true);
+}
+
+////////////////////////////////////////////////////////////////////////////////
 // RootWindow, private:
 
 void RootWindow::HandleMouseCaptureChanged(Window* old_capture_window) {
   if (capture_window_)
     host_->SetCapture();
   else
     host_->ReleaseCapture();
 
   if (old_capture_window && old_capture_window->delegate()) {
     // Send a capture changed event with bogus location data.
@@ skipping 426 matching lines @@
 void RootWindow::UnlockCompositor() {
   DCHECK(compositor_lock_);
   compositor_lock_ = NULL;
   if (draw_on_compositor_unlock_) {
     draw_on_compositor_unlock_ = false;
     ScheduleDraw();
   }
 }
 
 }  // namespace aura