PPAPI: Make blocking completion callbacks work.

webkit/plugins/ppapi/ppb_file_chooser_impl.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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 WEBKIT_PLUGINS_PPAPI_PPB_FILE_CHOOSER_IMPL_H_
 #define WEBKIT_PLUGINS_PPAPI_PPB_FILE_CHOOSER_IMPL_H_
 
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "ppapi/c/dev/ppb_file_chooser_dev.h"
 #include "ppapi/shared_impl/array_writer.h"
 #include "ppapi/shared_impl/resource.h"
 #include "ppapi/thunk/ppb_file_chooser_api.h"
 #include "webkit/plugins/webkit_plugins_export.h"
 
-struct PP_CompletionCallback;
-
 namespace ppapi {
 class TrackedCallback;
 }
 
 namespace WebKit {
 class WebString;
 }
 
 namespace webkit {
 namespace ppapi {
@@ skipping 17 matching lines @@
 
   // Resource overrides.
   virtual ::ppapi::thunk::PPB_FileChooser_API* AsPPB_FileChooser_API() OVERRIDE;
 
   // Stores the list of selected files.
   void StoreChosenFiles(const std::vector<std::string>& files);
 
   // Check that |callback| is valid (only non-blocking operation is supported)
   // and that no callback is already pending. Returns |PP_OK| if okay, else
   // |PP_ERROR_...| to be returned to the plugin.
-  int32_t ValidateCallback(const PP_CompletionCallback& callback);
+  int32_t ValidateCallback(scoped_refptr< ::ppapi::TrackedCallback> callback);
 
   // Sets up |callback| as the pending callback. This should only be called once
   // it is certain that |PP_OK_COMPLETIONPENDING| will be returned.
-  void RegisterCallback(const PP_CompletionCallback& callback);
+  void RegisterCallback(scoped_refptr< ::ppapi::TrackedCallback> callback);
 
   void RunCallback(int32_t result);
 
   // PPB_FileChooser_API implementation.
-  virtual int32_t Show(const PP_ArrayOutput& output,
-                       const PP_CompletionCallback& callback) OVERRIDE;
+  virtual int32_t Show(
+      const PP_ArrayOutput& output,
+      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
   virtual int32_t ShowWithoutUserGesture(
       PP_Bool save_as,
       PP_Var suggested_file_name,
       const PP_ArrayOutput& output,
-      const PP_CompletionCallback& callback);
-  virtual int32_t Show0_5(const PP_CompletionCallback& callback) OVERRIDE;
+      scoped_refptr< ::ppapi::TrackedCallback> callback);
+  virtual int32_t Show0_5(
+      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
   virtual PP_Resource GetNextChosenFile() OVERRIDE;
   virtual int32_t ShowWithoutUserGesture0_5(
       PP_Bool save_as,
       PP_Var suggested_file_name,
-      const PP_CompletionCallback& callback) OVERRIDE;
+      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
 
   // Splits a comma-separated MIME type list |accept_mime_types|, trims the
   // resultant split types, makes them lowercase, and returns them.
   // Though this should be private, this is public for testing.
   WEBKIT_PLUGINS_EXPORT static std::vector<WebKit::WebString> ParseAcceptValue(
       const std::string& accept_mime_types);
 
  private:
   PP_FileChooserMode_Dev mode_;
   std::string accept_mime_types_;
   scoped_refptr< ::ppapi::TrackedCallback> callback_;
 
   // When using the v0.6 of the API, this will contain the output for the
   // resources when the show command is complete. When using 0.5, this
   // object will be is_null() and the chosen_files_ will be used instead.
   ::ppapi::ArrayWriter output_;
 
   // Used to store and iterate over the results when using 0.5 of the API.
   // These are valid when we get a file result and output_ is not null.
   std::vector< scoped_refptr<Resource> > chosen_files_;
   size_t next_chosen_file_index_;
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PPB_FILE_CHOOSER_IMPL_H_