PPAPI: Make CompletionCallbacks work right on background threads.

ppapi/tests/test_utils.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 PPAPI_TESTS_TEST_UTILS_H_
 #define PPAPI_TESTS_TEST_UTILS_H_
 
 #include <string>
 
 #include "ppapi/c/dev/ppb_testing_dev.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/cpp/completion_callback.h"
+#include "ppapi/cpp/dev/message_loop_dev.h"
 #include "ppapi/utility/completion_callback_factory.h"
 
 // Timeout to wait for some action to complete.
 extern const int kActionTimeoutMs;
 
 const PPB_Testing_Dev* GetTestingInterface();
 std::string ReportError(const char* method, int32_t error);
 void PlatformSleep(int duration_ms);
 bool GetLocalHostPort(PP_Instance instance, std::string* host, uint16_t* port);
 
@@ skipping 121 matching lines @@
   bool failed() { return !errors_.empty(); }
   const std::string& errors() { return errors_; }
 
   int32_t result() const { return result_; }
 
   // Reset so that this callback can be used again.
   void Reset();
 
  private:
   static void Handler(void* user_data, int32_t result);
+  void RunMessageLoop();
+  void QuitMessageLoop();
 
   // Used to check that WaitForResult is only called once for each usage of the
   // callback.
   bool wait_for_result_called_;
   // Indicates whether we have already been invoked.
   bool have_result_;
   // The last result received (or PP_OK_COMPLETIONCALLBACK if none).
   int32_t result_;
   CallbackType callback_type_;
   bool post_quit_task_;
   std::string errors_;
   unsigned run_count_;
   PP_Instance instance_;
   Delegate* delegate_;
+  pp::MessageLoop_Dev target_loop_;
 };
 
 // Verifies that the callback didn't record any errors. If the callback is run
 // in an unexpected way (e.g., if it's invoked asynchronously when the call
 // should have blocked), this returns an appropriate error string.
 #define CHECK_CALLBACK_BEHAVIOR(callback) \
 do { \
   if ((callback).failed()) \
     return (callback).errors(); \
 } while (false)
@@ skipping 22 matching lines @@
 #error Please add support for your platform in ppapi/tests/test_utils.h
 #endif
 
 /* These are used to determine POSIX-like implementations vs Windows. */
 #if defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || \
     defined(__OpenBSD__) || defined(__sun) || defined(__native_client__)
 #define PPAPI_POSIX 1
 #endif
 
 #endif  // PPAPI_TESTS_TEST_UTILS_H_