Fix ppb_graphics_3d example code

ppapi/api/ppb_graphics_3d.idl

 /* 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.
  */
 
 /**
  * Defines the <code>PPB_Graphics3D</code> struct representing a 3D graphics
  * context within the browser.
  */
 
@@ skipping 11 matching lines @@
 /**
  * <code>PPB_Graphics3D</code> defines the interface for a 3D graphics context.
  * <strong>Example usage from plugin code:</strong>
  * 
  * <strong>Setup:</strong>
  * @code
  * PP_Resource context;
  * int32_t attribs[] = {PP_GRAPHICS3DATTRIB_WIDTH, 800,
  *                      PP_GRAPHICS3DATTRIB_HEIGHT, 800,
  *                      PP_GRAPHICS3DATTRIB_NONE};
- * context = g3d->Create(instance, attribs, &context);
+ * context = g3d->Create(instance, 0, attribs);
  * inst->BindGraphics(instance, context);
  * @endcode
  *
  * <strong>Present one frame:</strong>
  * @code
- * gles2->Clear(context, GL_COLOR_BUFFER);
- * g3d->SwapBuffers(context);
+ * PP_CompletionCallback callback = {
+ *   DidFinishSwappingBuffers, 0, PP_COMPLETIONCALLBACK_FLAG_NONE,
+ * };
+ * gles2->Clear(context, GL_COLOR_BUFFER_BIT);
+ * g3d->SwapBuffers(context, callback);
  * @endcode
  *
  * <strong>Shutdown:</strong>
  * @code
  * core->ReleaseResource(context);
  * @endcode
  */
 [macro="PPB_GRAPHICS_3D_INTERFACE"]
 interface PPB_Graphics3D {
   /**
@@ skipping 35 matching lines @@
    * @param[in] instance The module instance.
    *
    * @param[in] share_context The 3D context with which the created context
    * would share resources. If <code>share_context</code> is not 0, then all
    * shareable data, as defined by the client API (note that for OpenGL and
    * OpenGL ES, shareable data excludes texture objects named 0) will be shared
    * by <code>share_context<code>, all other contexts <code>share_context</code>
    * already shares with, and the newly created context. An arbitrary number of
    * <code>PPB_Graphics3D</code> can share data in this fashion.
    *
-   * @param[out] attrib_list specifies a list of attributes for the context.
+   * @param[in] attrib_list specifies a list of attributes for the context.
    * It is a list of attribute name-value pairs in which each attribute is
    * immediately followed by the corresponding desired value. The list is
    * terminated with <code>PP_GRAPHICS3DATTRIB_NONE</code>.
    * The <code>attrib_list<code> may be 0 or empty (first attribute is
    * <code>PP_GRAPHICS3DATTRIB_NONE</code>). If an attribute is not
    * specified in <code>attrib_list</code>, then the default value is used
    * (it is said to be specified implicitly).
    * Attributes for the context are chosen according to an attribute-specific
    * criteria. Attributes can be classified into two categories:
    * - AtLeast: The attribute value in the returned context meets or exceeds
@@ skipping 180 matching lines @@
    * @return Returns PP_OK on success or:
    * - <code>PP_ERROR_BADRESOURCE</code> if context is invalid.
    * - <code>PP_ERROR_BADARGUMENT</code> if callback is invalid.
    *
    */
   int32_t SwapBuffers(
       [in] PP_Resource context,
       [in] PP_CompletionCallback callback);
 };