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

chrome/browser/file_select_helper.h

 // 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.
 
 #ifndef CHROME_BROWSER_FILE_SELECT_HELPER_H_
 #define CHROME_BROWSER_FILE_SELECT_HELPER_H_
 #pragma once
 
 #include <map>
 #include <vector>
 
 #include "base/compiler_specific.h"
+#include "base/gtest_prod_util.h"
 #include "chrome/browser/ui/select_file_dialog.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "net/base/directory_lister.h"
 
 class Profile;
 
 namespace content {
 class RenderViewHost;
 struct FileChooserParams;
@@ skipping 13 matching lines @@
   static void RunFileChooser(content::WebContents* tab,
                              const content::FileChooserParams& params);
 
   // Enumerates all the files in directory.
   static void EnumerateDirectory(content::WebContents* tab,
                                  int request_id,
                                  const FilePath& path);
 
  private:
   friend class base::RefCountedThreadSafe<FileSelectHelper>;
+  FRIEND_TEST_ALL_PREFIXES(FileSelectHelperTest, IsAcceptTypeValid);
   explicit FileSelectHelper(Profile* profile);
   virtual ~FileSelectHelper();
 
   // Utility class which can listen for directory lister events and relay
   // them to the main object with the correct tracking id.
   class DirectoryListerDispatchDelegate
       : public net::DirectoryLister::DirectoryListerDelegate {
    public:
     DirectoryListerDispatchDelegate(FileSelectHelper* parent, int id)
         : parent_(parent),
@@ skipping 60 matching lines @@
       const net::DirectoryLister::DirectoryListerData& data);
   virtual void OnListDone(int id, int error);
 
   // Cleans up and releases this instance. This must be called after the last
   // callback is received from the enumeration code.
   void EnumerateDirectoryEnd();
 
   // Helper method to get allowed extensions for select file dialog from
   // the specified accept types as defined in the spec:
   //   http://whatwg.org/html/number-state.html#attr-input-accept
-  // |accept_types| contains only valid lowercased MIME types.
+  // |accept_types| contains only valid lowercased MIME types or file extensions
+  // beginning with a period (.).
   SelectFileDialog::FileTypeInfo* GetFileTypesFromAcceptType(
       const std::vector<string16>& accept_types);
 
+  // Check the accept type is valid. It is expected to be all lower case with
+  // no whitespace.
+  static bool IsAcceptTypeValid(const std::string& accept_type);
+
   // Profile used to set/retrieve the last used directory.
   Profile* profile_;
 
   // The RenderViewHost and WebContents for the page showing a file dialog
   // (may only be one such dialog).
   content::RenderViewHost* render_view_host_;
   content::WebContents* web_contents_;
 
   // Dialog box used for choosing files to upload from file form fields.
   scoped_refptr<SelectFileDialog> select_file_dialog_;
   scoped_ptr<SelectFileDialog::FileTypeInfo> select_file_types_;
 
   // The type of file dialog last shown.
   SelectFileDialog::Type dialog_type_;
 
   // Maintain a list of active directory enumerations.  These could come from
   // the file select dialog or from drag-and-drop of directories, so there could
   // be more than one going on at a time.
   struct ActiveDirectoryEnumeration;
   std::map<int, ActiveDirectoryEnumeration*> directory_enumerations_;
 
   // Registrar for notifications regarding our RenderViewHost.
   content::NotificationRegistrar notification_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(FileSelectHelper);
 };
 
 #endif  // CHROME_BROWSER_FILE_SELECT_HELPER_H_