Add new MouseCursor interface for setting the mouse cursor.

ppapi/cpp/mouse_cursor.cc

Index: ppapi/cpp/mouse_cursor.cc
diff --git a/ppapi/cpp/mouse_cursor.cc b/ppapi/cpp/mouse_cursor.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c5ac20a2cb7c50dad41fd3fc49085e54999f0c53
--- /dev/null
+++ b/ppapi/cpp/mouse_cursor.cc
@@ -0,0 +1,31 @@
+// 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 "ppapi/cpp/mouse_cursor.h"
+
+#include "ppapi/cpp/module_impl.h"
+
+namespace pp {
+
+namespace {
+
+template <> const char* interface_name<PPB_MouseCursor_1_0>() {
+  return PPB_MOUSECURSOR_INTERFACE_1_0;
+}
+
+}  // namespace
+
+// static
+bool MouseCursor::SetCursor(const InstanceHandle& instance,
+                            PP_MouseCursor_Type type,
+                            const ImageData& image,
+                            const Point& hot_spot) {
+  if (!has_interface<PPB_MouseCursor_1_0>())
+    return false;
+  return PP_ToBool(get_interface<PPB_MouseCursor_1_0>()->SetCursor(
+      instance.pp_instance(), type, image.pp_resource(),
+      &hot_spot.pp_point()));
+}
+
+}  // namespace pp