aura-x11: Add custom web cursor support.

ui/aura/root_window_host_linux.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_host_linux.h"
 
 #include <X11/cursorfont.h>
 #include <X11/extensions/XInput2.h>
 #include <algorithm>
 
@@ skipping 532 matching lines @@
   current_cursor_ = cursor;
 
   // Custom web cursors are handled directly.
   if (cursor == kCursorCustom)
     return;
 
   if (cursor_shown_)
     SetCursorInternal(cursor);
 }
 
+void RootWindowHostLinux::SetCustomCursor(const gfx::PlatformCursor& cursor) {
+  if (cursor_shown_)
+    XDefineCursor(xdisplay_, xwindow_, cursor);
+}
+
 void RootWindowHostLinux::ShowCursor(bool show) {
   if (show == cursor_shown_)
     return;
   cursor_shown_ = show;
   SetCursorInternal(show ? current_cursor_ : kCursorNone);
 }
 
 gfx::Point RootWindowHostLinux::QueryMouseLocation() {
   ::Window root_return, child_return;
   int root_x_return, root_y_return, win_x_return, win_y_return;
@@ skipping 91 matching lines @@
   return new RootWindowHostLinux(bounds);
 }
 
 // static
 gfx::Size RootWindowHost::GetNativeScreenSize() {
   ::Display* xdisplay = base::MessagePumpX::GetDefaultXDisplay();
   return gfx::Size(DisplayWidth(xdisplay, 0), DisplayHeight(xdisplay, 0));
 }
 
 }  // namespace aura