WebVR API Implementation, r=larsbergstrom

components/webvr_traits/webvr_traits.rs

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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use ipc_channel::ipc::IpcSender;
+use msg::constellation_msg::PipelineId;
+use webvr::*;
+
+pub type WebVRResult<T> = Result<T, String>;
+
+// Messages from Script thread to WebVR thread.
+#[derive(Deserialize, Serialize)]
+pub enum WebVRMsg {
+    RegisterContext(PipelineId),
+    UnregisterContext(PipelineId),
+    PollEvents(IpcSender<bool>),
+    GetDisplays(IpcSender<WebVRResult<Vec<VRDisplayData>>>),
+    GetFrameData(PipelineId, u64, f64, f64, IpcSender<WebVRResult<VRFrameData>>),
+    ResetPose(PipelineId, u64, IpcSender<WebVRResult<VRDisplayData>>),
+    RequestPresent(PipelineId, u64, IpcSender<WebVRResult<()>>),
+    ExitPresent(PipelineId, u64, Option<IpcSender<WebVRResult<()>>>),
+    CreateCompositor(u64),
+    Exit,
+}