Modified the pepper file chooser API to support filtering files by extensions.

ppapi/api/dev/ppb_file_chooser_dev.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.
  */
 
 
 /**
  * This file defines the <code>PPB_FileChooser_Dev</code> interface.
  */
 
@@ skipping 21 matching lines @@
 interface PPB_FileChooser_Dev {
  /**
   * This function creates a file chooser dialog resource.  The chooser is
   * associated with a particular instance, so that it may be positioned on the
   * screen relative to the tab containing the instance.
   *
   * @param[in] instance A <code>PP_Instance</code> identifying one instance
   * of a module.
   * @param[in] mode A <code>PP_FileChooserMode_Dev</code> value that controls
   * the behavior of the file chooser dialog.
-  * @param[in] accept_mime_types A comma-separated list of MIME types such as
-  * "audio/ *,text/plain" (note there should be no space between the '/' and
-  * the '*', but one is added to avoid confusing C++ comments).  The dialog
-  * may restrict selectable files to the specified MIME types. An empty string
-  * or an undefined var may be given to indicate that all types should be
-  * accepted.
+  * @param[in] accept_types A comma-separated list of MIME types and file
+  * extensions such as "audio/ *,text/plain,.html" (note there should be no
+  * space between the '/' and the '*', but one is added to avoid confusing C++
+  * comments). The dialog may restrict selectable files to the specified MIME
+  * types and file extensions. If a string in the comma-separated list begins
+  * with a period (.) then the string is interpreted as a file extension,
+  * otherwise it is interpreted as a MIME-type. An empty string or an undefined
+  * var may be given to indicate that all types should be accepted.
   *
   * @return A <code>PP_Resource</code> containing the file chooser if
   * successful or 0 if it could not be created.
   */
   PP_Resource Create(
       [in] PP_Instance instance,
       [in] PP_FileChooserMode_Dev mode,
-      [in] PP_Var accept_mime_types);
+      [in] PP_Var accept_types);
 
   /**
    * Determines if the provided resource is a file chooser.
    *
    * @param[in] resource A <code>PP_Resource</code> corresponding to a generic
    * resource.
    *
    * @return A <code>PP_Bool</code> that is <code>PP_TRUE</code> if the given
    * resource is a file chooser resource, otherwise <code>PP_FALSE</code>.
    */
@@ skipping 55 matching lines @@
    *
    * @return PP_OK_COMPLETIONPENDING if request to show the dialog was
    * successful, another error code from pp_errors.h on failure.
    */
   [version=0.6]
   int32_t Show([in] PP_Resource chooser,
                [in] PP_ArrayOutput output,
                [in] PP_CompletionCallback callback);
 };