[PPAPI] Fix a bunch of spelling mistakes

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 191 matching lines @@
   int32_t SetAttribs(
       [in] PP_Resource context,
       [in] int32_t[] attrib_list);
 
   /**
    * GetError() returns the current state of the given 3D context.
    *
    * The recoverable error conditions that have no side effect are
    * detected and returned immediately by all functions in this interface.
    * In addition the implementation may get into a fatal state while
-   * processing a command. In this case the application must detroy the
+   * processing a command. In this case the application must destroy the
    * context and reinitialize client API state and objects to continue
    * rendering.
    *
    * Note that the same error code is also returned in the SwapBuffers callback.
    * It is recommended to handle error in the SwapBuffers callback because
    * GetError is synchronous. This function may be useful in rare cases where
    * drawing a frame is expensive and you want to verify the result of
-   * ResizeBuffers before attemptimg to draw a frame.
+   * ResizeBuffers before attempting to draw a frame.
    *
    * @param[in] The 3D graphics context.
    * @return Returns:
    * - <code>PP_OK</code> if no error
    * - <code>PP_ERROR_NOMEMORY</code>
    * - <code>PP_ERROR_CONTEXT_LOST</code>
    */
   int32_t GetError(
       [in] PP_Resource context);
 
@@ skipping 53 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);
 };