Convert a few ppapi dev interfaces to IDL. NaCl has tests for these

ppapi/api/dev/ppb_testing_dev.idl

Index: ppapi/api/dev/ppb_testing_dev.idl
diff --git a/ppapi/api/dev/ppb_testing_dev.idl b/ppapi/api/dev/ppb_testing_dev.idl
new file mode 100644
index 0000000000000000000000000000000000000000..87d4541a086639c3e2034bd5603f3b37a47e1bbe
--- /dev/null
+++ b/ppapi/api/dev/ppb_testing_dev.idl
@@ -0,0 +1,80 @@
+/* Copyright (c) 2011 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 contains interface functions used for unit testing. Do not use in
+ * production code. They are not guaranteed to be available in normal plugin
+ * environments so you should not depend on them.
+ */
+
+label Chrome {
+  M14 = 0.7
+};
+
+interface PPB_Testing_Dev {
+  /**
+   * Reads the bitmap data out of the backing store for the given
+   * DeviceContext2D and into the given image. If the data was successfully
+   * read, it will return PP_TRUE.
+   *
+   * This function should not generally be necessary for normal plugin
+   * operation. If you want to update portions of a device, the expectation is
+   * that you will either regenerate the data, or maintain a backing store
+   * pushing updates to the device from your backing store via PaintImageData.
+   * Using this function will introduce an extra copy which will make your
+   * plugin slower. In some cases, this may be a very expensive operation (it
+   * may require slow cross-process transitions or graphics card readbacks).
+   *
+   * Data will be read into the image starting at |top_left| in the device
+   * context, and proceeding down and to the right for as many pixels as the
+   * image is large. If any part of the image bound would fall outside of the
+   * backing store of the device if positioned at |top_left|, this function
+   * will fail and return PP_FALSE.
+   *
+   * The image format must be of the format
+   * PPB_ImageData.GetNativeImageDataFormat() or this function will fail and
+   * return PP_FALSE.
+   *
+   * The returned image data will represent the current status of the backing
+   * store. This will not include any paint, scroll, or replace operations
+   * that have not yet been flushed; these operations are only reflected in
+   * the backing store (and hence ReadImageData) until after a Flush()
+   * operation has completed.
+   */
+  PP_Bool ReadImageData([in] PP_Resource device_context_2d,
+                        [in] PP_Resource image,
+                        [in] PP_Point top_left);
+
+  /**
+   * Runs a nested message loop. The plugin will be reentered from this call.
+   * This function is used for unit testing the API. The normal pattern is to
+   * issue some asynchronous call that has a callback. Then you call
+   * RunMessageLoop which will suspend the plugin and go back to processing
+   * messages, giving the asynchronous operation time to complete. In your
+   * callback, you save the data and call QuitMessageLoop, which will then
+   * pop back up and continue with the test. This avoids having to write a
+   * complicated state machine for simple tests for asynchronous APIs.
+   */
+  void RunMessageLoop([in] PP_Instance instance);
+
+  /**
+   * Posts a quit message for the outermost nested message loop. Use this to
+   * exit and return back to the caller after you call RunMessageLoop.
+   */
+  void QuitMessageLoop([in] PP_Instance instance);
+
+  /**
+   * Returns the number of live objects (resources + strings + objects)
+   * associated with this plugin instance. Used for detecting leaks. Returns
+   * (uint32_t)-1 on failure.
+   */
+  uint32_t GetLiveObjectsForInstance([in] PP_Instance instance);
+
+  /**
+   * Returns PP_TRUE if the plugin is running out-of-process, PP_FALSE
+   * otherwise.
+   */
+  PP_Bool IsOutOfProcess();
+};