PPAPI: implement GetSupportedPreviewSizes

ppapi/api/private/ppb_image_capture_private.idl

Index: ppapi/api/private/ppb_image_capture_private.idl
diff --git a/ppapi/api/private/ppb_image_capture_private.idl b/ppapi/api/private/ppb_image_capture_private.idl
index 36c410fa58ef043d7635fd9fde8084ed7f908929..75c75d5df5b29f03c766c97814e868bf77cf4d30 100644
--- a/ppapi/api/private/ppb_image_capture_private.idl
+++ b/ppapi/api/private/ppb_image_capture_private.idl
@@ -11,7 +11,7 @@
 [generate_thunk]
 
 label Chrome {
-  M39 = 0.1
+  M42 = 0.1
 };
 
 /**
@@ -28,22 +28,11 @@ interface PPB_ImageCapture_Private {
    *
    * @param[in] instance A <code>PP_Instance</code> identifying one instance
    * of a module.
-   * @param[in] camera_source_id A <code>PP_Var</code> identifying a camera
-   * source. The type is string. The ID can be obtained from
-   * MediaStreamTrack.getSources() or MediaStreamVideoTrack.id. If a
-   * MediaStreamVideoTrack is associated with the same source and the track
-   * is closed, this PPB_ImageCapture_Private object can still do image capture.
-   * @param[in] error_callback A <code>PPB_ImageCapture_Private_ErrorCallback
-   * </code> callback to indicate the image capture has failed.
-   * @param[inout] user_data An opaque pointer that will be passed to the
-   * callbacks of PPB_ImageCapture_Private.
    *
    * @return A <code>PP_Resource</code> corresponding to a
    * PPB_ImageCapture_Private resource if successful, 0 if failed.
    */
-  PP_Resource Create([in] PP_Instance instance,
-                     [in] PP_Var camera_source_id,
-                     [inout] mem_t user_data);
+  PP_Resource Create([in] PP_Instance instance);
 
   /**
    * Determines if a resource is an image capture resource.
@@ -57,6 +46,24 @@ interface PPB_ImageCapture_Private {
   PP_Bool IsImageCapture([in] PP_Resource resource);
 
   /**
+   * Opens a video capture device.
+   *
+   * @param[in] image_capture A <code>PP_Resource</code> corresponding to an
+   * image capture resource.
+   * @param[in] device_id A <code>PP_Var</code> identifying a camera device. The
+   * type is string. The ID can be obtained from MediaStreamTrack.getSources()
+   * or MediaStreamVideoTrack.id.
+   * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
+   * completion of <code>Open()</code>.
+   *
+   * @return An error code from <code>pp_errors.h</code>.
+   */
+  int32_t Open(
+      [in] PP_Resource image_capture,
+      [in] PP_Var device_id,
+      [in] PP_CompletionCallback callback);
+
+  /**
    * Disconnects from the camera and cancels all pending capture requests.
    * After this returns, no callbacks will be called. If <code>
    * PPB_ImageCapture_Private</code> is destroyed and is not closed yet, this
@@ -65,13 +72,8 @@ interface PPB_ImageCapture_Private {
    *
    * @param[in] image_capture A <code>PP_Resource</code> corresponding to an
    * image capture resource.
-   * @param[in] callback <code>PP_CompletionCallback</code> to be called upon
-   * completion of <code>Close()</code>.
-   *
-   * @return An int32_t containing a result code from <code>pp_errors.h</code>.
    */
-  int32_t Close([in] PP_Resource resource,
-                [in] PP_CompletionCallback callback);
+  void Close([in] PP_Resource image_capture);
 
   /**
    * Gets the camera capabilities.